Implemented QueueArgumentsAttribute (untested)

Examples/ExampleLib/ExampleConsoleApp.cs

@@ -24,7 +24,7 @@ namespace ExampleLib
         private readonly IDependencyContainer dependencyResolver;
         private readonly int expectedDoneCount;
         private int doneCount;
-        private readonly TaskCompletionSource<bool> doneSignal = new TaskCompletionSource<bool>();
+        private readonly TaskCompletionSource<bool> doneSignal = new();
 
 
         /// <param name="dependencyResolver">Uses Tapeti's IDependencyContainer interface so you can easily switch an example to your favourite IoC container</param>

Tapeti.Flow/Default/FlowProvider.cs

@@ -304,7 +304,7 @@ namespace Tapeti.Flow.Default
 
             private readonly ITapetiConfig config;
             private readonly FlowProvider flowProvider;
-            private readonly List<RequestInfo> requests = new List<RequestInfo>();
+            private readonly List<RequestInfo> requests = new();
 
 
             public ParallelRequestBuilder(ITapetiConfig config, FlowProvider flowProvider)

Tapeti.Flow/Default/FlowStore.cs

@@ -29,9 +29,9 @@ namespace Tapeti.Flow.Default
             }
         }
 
-        private readonly ConcurrentDictionary<Guid, CachedFlowState> flowStates = new ConcurrentDictionary<Guid, CachedFlowState>();
-        private readonly ConcurrentDictionary<Guid, Guid> continuationLookup = new ConcurrentDictionary<Guid, Guid>();
-        private readonly LockCollection<Guid> locks = new LockCollection<Guid>(EqualityComparer<Guid>.Default);
+        private readonly ConcurrentDictionary<Guid, CachedFlowState> flowStates = new();
+        private readonly ConcurrentDictionary<Guid, Guid> continuationLookup = new();
+        private readonly LockCollection<Guid> locks = new(EqualityComparer<Guid>.Default);
         private HashSet<string> validatedMethods;
 
         private readonly IFlowRepository repository;

Tapeti.Flow/FlowHelpers/LockCollection.cs

@@ -60,7 +60,7 @@ namespace Tapeti.Flow.FlowHelpers
             internal volatile LockItem Next;
 
             private readonly Dictionary<T, LockItem> locks;
-            private readonly TaskCompletionSource<IDisposable> tcs = new TaskCompletionSource<IDisposable>(TaskCreationOptions.RunContinuationsAsynchronously);
+            private readonly TaskCompletionSource<IDisposable> tcs = new(TaskCreationOptions.RunContinuationsAsynchronously);
             private readonly T key;
 
             public LockItem(Dictionary<T, LockItem> locks, T key)

Tapeti.Flow/FlowHelpers/MethodSerializer.cs

@@ -18,7 +18,7 @@ namespace Tapeti.Flow.FlowHelpers
         }
 
 
-        private static readonly Regex DeserializeRegex = new Regex("^(?<method>.+?)@(?<assembly>.+?):(?<type>.+?)$");
+        private static readonly Regex DeserializeRegex = new("^(?<method>.+?)@(?<assembly>.+?):(?<type>.+?)$");
 
         
         /// <summary>

Tapeti.Serilog/Default/DiagnosticContext.cs

@@ -10,7 +10,7 @@ namespace Tapeti.Serilog.Default
     public class DiagnosticContext : IDiagnosticContext
     {
         private readonly global::Serilog.ILogger logger;
-        private readonly List<LogEventProperty> properties = new List<LogEventProperty>();
+        private readonly List<LogEventProperty> properties = new();
 
         
         /// <summary>

Tapeti.Serilog/TapetiSeriLogger.cs

@@ -129,10 +129,11 @@ namespace Tapeti.Serilog
         }
 
         /// <inheritdoc />
-        public void QueueExistsWarning(string queueName, Dictionary<string, string> arguments)
+        public void QueueExistsWarning(string queueName, IReadOnlyDictionary<string, string> existingArguments, IReadOnlyDictionary<string, string> arguments)
         {
-            seriLogger.Warning("Tapeti: durable queue {queueName} exists with incompatible x-arguments ({arguments}) and will not be redeclared, queue will be consumed as-is",
+            seriLogger.Warning("Tapeti: durable queue {queueName} exists with incompatible x-arguments ({existingArguments} vs. {arguments}) and will not be redeclared, queue will be consumed as-is",
                 queueName,
+                existingArguments,
                 arguments);
         }
 

Tapeti.Tests/Tapeti.Tests.csproj

@@ -8,6 +8,12 @@
     <NoWarn>1701;1702</NoWarn>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Compile Remove="Core\**" />
+    <EmbeddedResource Remove="Core\**" />
+    <None Remove="Core\**" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="5.10.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
@@ -22,8 +28,4 @@
     <ProjectReference Include="..\Tapeti\Tapeti.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Folder Include="Core\" />
-  </ItemGroup>
-
 </Project>

Tapeti.Transient/TransientGenericBinding.cs

@@ -33,7 +33,7 @@ namespace Tapeti.Transient
         /// <inheritdoc />
         public async ValueTask Apply(IBindingTarget target)
         {
-            QueueName = await target.BindDynamicDirect(dynamicQueuePrefix);
+            QueueName = await target.BindDynamicDirect(dynamicQueuePrefix, null);
             router.TransientResponseQueueName = QueueName;
         }
 

Tapeti.Transient/TransientRouter.cs

@@ -13,7 +13,7 @@ namespace Tapeti.Transient
     internal class TransientRouter
     {
         private readonly int defaultTimeoutMs;
-        private readonly ConcurrentDictionary<Guid, TaskCompletionSource<object>> map = new ConcurrentDictionary<Guid, TaskCompletionSource<object>>();
+        private readonly ConcurrentDictionary<Guid, TaskCompletionSource<object>> map = new();
 
         /// <summary>
         /// The generated name of the dynamic queue to which responses should be sent.

Tapeti/Config/IBinding.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace Tapeti.Config
@@ -80,7 +81,8 @@ namespace Tapeti.Config
         /// </summary>
         /// <param name="messageClass">The message class to be bound to the queue</param>
         /// <param name="queueName">The name of the durable queue</param>
-        ValueTask BindDurable(Type messageClass, string queueName);
+        /// <param name="arguments">Optional arguments</param>
+        ValueTask BindDurable(Type messageClass, string queueName, IReadOnlyDictionary<string, string> arguments);
 
         /// <summary>
         /// Binds the messageClass to a dynamic auto-delete queue.
@@ -91,15 +93,17 @@ namespace Tapeti.Config
         /// </remarks>
         /// <param name="messageClass">The message class to be bound to the queue</param>
         /// <param name="queuePrefix">An optional prefix for the dynamic queue's name. If not provided, RabbitMQ's default logic will be used to create an amq.gen queue.</param>
+        /// <param name="arguments">Optional arguments</param>
         /// <returns>The generated name of the dynamic queue</returns>
-        ValueTask<string> BindDynamic(Type messageClass, string queuePrefix = null);
+        ValueTask<string> BindDynamic(Type messageClass, string queuePrefix, IReadOnlyDictionary<string, string> arguments);
 
         /// <summary>
         /// Declares a durable queue but does not add a binding for a messageClass' routing key.
         /// Used for direct-to-queue messages.
         /// </summary>
         /// <param name="queueName">The name of the durable queue</param>
-        ValueTask BindDurableDirect(string queueName);
+        /// <param name="arguments">Optional arguments</param>
+        ValueTask BindDurableDirect(string queueName, IReadOnlyDictionary<string, string> arguments);
 
         /// <summary>
         /// Declares a dynamic queue but does not add a binding for a messageClass' routing key.
@@ -107,16 +111,18 @@ namespace Tapeti.Config
         /// </summary>
         /// <param name="messageClass">The message class which will be handled on the queue. It is not actually bound to the queue.</param>
         /// <param name="queuePrefix">An optional prefix for the dynamic queue's name. If not provided, RabbitMQ's default logic will be used to create an amq.gen queue.</param>
+        /// <param name="arguments">Optional arguments</param>
         /// <returns>The generated name of the dynamic queue</returns>
-        ValueTask<string> BindDynamicDirect(Type messageClass = null, string queuePrefix = null);
+        ValueTask<string> BindDynamicDirect(Type messageClass, string queuePrefix, IReadOnlyDictionary<string, string> arguments);
 
         /// <summary>
         /// Declares a dynamic queue but does not add a binding for a messageClass' routing key.
         /// Used for direct-to-queue messages. Guarantees a unique queue.
         /// </summary>
         /// <param name="queuePrefix">An optional prefix for the dynamic queue's name. If not provided, RabbitMQ's default logic will be used to create an amq.gen queue.</param>
+        /// <param name="arguments">Optional arguments</param>
         /// <returns>The generated name of the dynamic queue</returns>
-        ValueTask<string> BindDynamicDirect(string queuePrefix = null);
+        ValueTask<string> BindDynamicDirect(string queuePrefix, IReadOnlyDictionary<string, string> arguments);
 
         /// <summary>
         /// Marks the specified durable queue as having an obsolete binding. If after all bindings have subscribed, the queue only contains obsolete

Tapeti/Connection/ITapetiClient.cs

@@ -74,11 +74,11 @@ namespace Tapeti.Connection
         /// <summary>
         /// Starts a consumer for the specified queue, using the provided bindings to handle messages.
         /// </summary>
-        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
         /// <param name="queueName"></param>
         /// <param name="consumer">The consumer implementation which will receive the messages from the queue</param>
+        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
         /// <returns>The consumer tag as returned by BasicConsume.</returns>
-        Task<TapetiConsumerTag> Consume(CancellationToken cancellationToken, string queueName, IConsumer consumer);
+        Task<TapetiConsumerTag> Consume(string queueName, IConsumer consumer, CancellationToken cancellationToken);
 
         /// <summary>
         /// Stops the consumer with the specified tag.
@@ -89,40 +89,43 @@ namespace Tapeti.Connection
         /// <summary>
         /// Creates a durable queue if it does not already exist, and updates the bindings.
         /// </summary>
-        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
         /// <param name="queueName">The name of the queue to create</param>
         /// <param name="bindings">A list of bindings. Any bindings already on the queue which are not in this list will be removed</param>
-        Task DurableQueueDeclare(CancellationToken cancellationToken, string queueName, IEnumerable<QueueBinding> bindings);
+        /// <param name="arguments">Optional arguments</param>
+        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
+        Task DurableQueueDeclare(string queueName, IEnumerable<QueueBinding> bindings, IReadOnlyDictionary<string, string> arguments, CancellationToken cancellationToken);
 
         /// <summary>
         /// Verifies a durable queue exists. Will raise an exception if it does not.
         /// </summary>
-        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
         /// <param name="queueName">The name of the queue to verify</param>
-        Task DurableQueueVerify(CancellationToken cancellationToken, string queueName);
+        /// <param name="arguments">Optional arguments</param>
+        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
+        Task DurableQueueVerify(string queueName, IReadOnlyDictionary<string, string> arguments, CancellationToken cancellationToken);
 
         /// <summary>
         /// Deletes a durable queue.
         /// </summary>
-        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
         /// <param name="queueName">The name of the queue to delete</param>
         /// <param name="onlyIfEmpty">If true, the queue will only be deleted if it is empty otherwise all bindings will be removed. If false, the queue is deleted even if there are queued messages.</param>
-        Task DurableQueueDelete(CancellationToken cancellationToken, string queueName, bool onlyIfEmpty = true);
+        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
+        Task DurableQueueDelete(string queueName, bool onlyIfEmpty, CancellationToken cancellationToken);
 
         /// <summary>
         /// Creates a dynamic queue.
         /// </summary>
-        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
         /// <param name="queuePrefix">An optional prefix for the dynamic queue's name. If not provided, RabbitMQ's default logic will be used to create an amq.gen queue.</param>
-        Task<string> DynamicQueueDeclare(CancellationToken cancellationToken, string queuePrefix = null);
+        /// <param name="arguments">Optional arguments</param>
+        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
+        Task<string> DynamicQueueDeclare(string queuePrefix, IReadOnlyDictionary<string, string> arguments, CancellationToken cancellationToken);
 
         /// <summary>
         /// Add a binding to a dynamic queue.
         /// </summary>
-        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
         /// <param name="queueName">The name of the dynamic queue previously created using DynamicQueueDeclare</param>
         /// <param name="binding">The binding to add to the dynamic queue</param>
-        Task DynamicQueueBind(CancellationToken cancellationToken, string queueName, QueueBinding binding);
+        /// <param name="cancellationToken">Cancelled when the connection is lost</param>
+        Task DynamicQueueBind(string queueName, QueueBinding binding, CancellationToken cancellationToken);
 
         /// <summary>
         /// Closes the connection to RabbitMQ gracefully.

Tapeti/Connection/TapetiChannel.cs

@@ -20,7 +20,7 @@ namespace Tapeti.Connection
     internal class TapetiChannel
     {
         private readonly Func<IModel> modelFactory;
-        private readonly object taskQueueLock = new object();
+        private readonly object taskQueueLock = new();
         private SingleThreadTaskQueue taskQueue;
         private readonly ModelProvider modelProvider;
 

Tapeti/Connection/TapetiClient.cs

@@ -13,6 +13,7 @@ using RabbitMQ.Client.Exceptions;
 using Tapeti.Config;
 using Tapeti.Default;
 using Tapeti.Exceptions;
+using Tapeti.Helpers;
 
 namespace Tapeti.Connection
 {
@@ -50,7 +51,7 @@ namespace Tapeti.Connection
         private readonly HttpClient managementClient;
 
         // These fields must be locked using connectionLock
-        private readonly object connectionLock = new object();
+        private readonly object connectionLock = new();
         private long connectionReference;
         private RabbitMQ.Client.IConnection connection;
         private IModel consumeChannelModel;
@@ -61,12 +62,12 @@ namespace Tapeti.Connection
 
         // These fields are for use in a single TapetiChannel's queue only!
         private ulong lastDeliveryTag;
-        private readonly HashSet<string> deletedQueues = new HashSet<string>();
+        private readonly HashSet<string> deletedQueues = new();
 
         // These fields must be locked using confirmLock, since the callbacks for BasicAck/BasicReturn can run in a different thread
-        private readonly object confirmLock = new object();
-        private readonly Dictionary<ulong, ConfirmMessageInfo> confirmMessages = new Dictionary<ulong, ConfirmMessageInfo>();
-        private readonly Dictionary<string, ReturnInfo> returnRoutingKeys = new Dictionary<string, ReturnInfo>();
+        private readonly object confirmLock = new();
+        private readonly Dictionary<ulong, ConfirmMessageInfo> confirmMessages = new();
+        private readonly Dictionary<string, ReturnInfo> returnRoutingKeys = new();
 
 
         private class ConfirmMessageInfo
@@ -198,7 +199,7 @@ namespace Tapeti.Connection
 
 
         /// <inheritdoc />
-        public async Task<TapetiConsumerTag> Consume(CancellationToken cancellationToken, string queueName, IConsumer consumer)
+        public async Task<TapetiConsumerTag> Consume(string queueName, IConsumer consumer, CancellationToken cancellationToken)
         {
             if (deletedQueues.Contains(queueName))
                 return null;
@@ -285,7 +286,7 @@ namespace Tapeti.Connection
         }
 
 
-        private async Task<bool> GetDurableQueueDeclareRequired(string queueName)
+        private async Task<bool> GetDurableQueueDeclareRequired(string queueName, IReadOnlyDictionary<string, string> arguments)
         {
             var existingQueue = await GetQueueInfo(queueName);
             if (existingQueue == null) 
@@ -294,18 +295,22 @@ namespace Tapeti.Connection
             if (!existingQueue.Durable || existingQueue.AutoDelete || existingQueue.Exclusive)
                 throw new InvalidOperationException($"Durable queue {queueName} already exists with incompatible parameters, durable = {existingQueue.Durable} (expected True), autoDelete = {existingQueue.AutoDelete} (expected False), exclusive = {existingQueue.Exclusive} (expected False)");
 
-            if (existingQueue.Arguments.Count <= 0) 
+            if (arguments == null && existingQueue.Arguments.Count == 0)
                 return true;
 
-            (logger as IBindingLogger)?.QueueExistsWarning(queueName, existingQueue.Arguments);
+            if (existingQueue.Arguments.NullSafeSameValues(arguments))
+                return true;
+
+            (logger as IBindingLogger)?.QueueExistsWarning(queueName, existingQueue.Arguments, arguments);
             return false;
         }
 
 
+
         /// <inheritdoc />
-        public async Task DurableQueueDeclare(CancellationToken cancellationToken, string queueName, IEnumerable<QueueBinding> bindings)
+        public async Task DurableQueueDeclare(string queueName, IEnumerable<QueueBinding> bindings, IReadOnlyDictionary<string, string> arguments, CancellationToken cancellationToken)
         {
-            var declareRequired = await GetDurableQueueDeclareRequired(queueName);
+            var declareRequired = await GetDurableQueueDeclareRequired(queueName, arguments);
 
             var existingBindings = (await GetQueueBindings(queueName)).ToList();
             var currentBindings = bindings.ToList();
@@ -319,7 +324,7 @@ namespace Tapeti.Connection
                 if (declareRequired)
                 {
                     bindingLogger?.QueueDeclare(queueName, true, false);
-                    channel.QueueDeclare(queueName, true, false, false);
+                    channel.QueueDeclare(queueName, true, false, false, GetDeclareArguments(arguments));
                 }
 
                 foreach (var binding in currentBindings.Except(existingBindings))
@@ -337,10 +342,20 @@ namespace Tapeti.Connection
             });
         }
 
-        /// <inheritdoc />
-        public async Task DurableQueueVerify(CancellationToken cancellationToken, string queueName)
+
+        private static IDictionary<string, object> GetDeclareArguments(IReadOnlyDictionary<string, string> arguments)
         {
-            if (!await GetDurableQueueDeclareRequired(queueName))
+            if (arguments == null || arguments.Count == 0)
+                return null;
+
+            return arguments.ToDictionary(p => p.Key, p => (object)Encoding.UTF8.GetBytes(p.Value));
+        }
+
+
+        /// <inheritdoc />
+        public async Task DurableQueueVerify(string queueName, IReadOnlyDictionary<string, string> arguments, CancellationToken cancellationToken)
+        {
+            if (!await GetDurableQueueDeclareRequired(queueName, arguments))
                 return;
 
             await GetTapetiChannel(TapetiChannelType.Consume).Queue(channel =>
@@ -355,7 +370,7 @@ namespace Tapeti.Connection
 
 
         /// <inheritdoc />
-        public async Task DurableQueueDelete(CancellationToken cancellationToken, string queueName, bool onlyIfEmpty = true)
+        public async Task DurableQueueDelete(string queueName, bool onlyIfEmpty, CancellationToken cancellationToken)
         {
             if (!onlyIfEmpty)
             {
@@ -440,7 +455,7 @@ namespace Tapeti.Connection
 
 
         /// <inheritdoc />
-        public async Task<string> DynamicQueueDeclare(CancellationToken cancellationToken, string queuePrefix = null)
+        public async Task<string> DynamicQueueDeclare(string queuePrefix, IReadOnlyDictionary<string, string> arguments, CancellationToken cancellationToken)
         {
             string queueName = null;
             var bindingLogger = logger as IBindingLogger;
@@ -454,11 +469,11 @@ namespace Tapeti.Connection
                 {
                     queueName = queuePrefix + "." + Guid.NewGuid().ToString("N");
                     bindingLogger?.QueueDeclare(queueName, false, false);
-                    channel.QueueDeclare(queueName);
+                    channel.QueueDeclare(queueName, arguments: GetDeclareArguments(arguments));
                 }
                 else
                 {
-                    queueName = channel.QueueDeclare().QueueName;
+                    queueName = channel.QueueDeclare(arguments: GetDeclareArguments(arguments)).QueueName;
                     bindingLogger?.QueueDeclare(queueName, false, false);
                 }
             });
@@ -467,7 +482,7 @@ namespace Tapeti.Connection
         }
 
         /// <inheritdoc />
-        public async Task DynamicQueueBind(CancellationToken cancellationToken, string queueName, QueueBinding binding)
+        public async Task DynamicQueueBind(string queueName, QueueBinding binding, CancellationToken cancellationToken)
         {
             await GetTapetiChannel(TapetiChannelType.Consume).Queue(channel =>
             {
@@ -523,7 +538,7 @@ namespace Tapeti.Connection
         }
 
 
-        private static readonly List<HttpStatusCode> TransientStatusCodes = new List<HttpStatusCode>()
+        private static readonly List<HttpStatusCode> TransientStatusCodes = new()
         {
             HttpStatusCode.GatewayTimeout,
             HttpStatusCode.RequestTimeout,
@@ -675,7 +690,7 @@ namespace Tapeti.Connection
         }
 
 
-        private readonly HashSet<string> declaredExchanges = new HashSet<string>();
+        private readonly HashSet<string> declaredExchanges = new();
 
         private void DeclareExchange(IModel channel, string exchange)
         {
@@ -842,7 +857,7 @@ namespace Tapeti.Connection
                             GetTapetiChannel(TapetiChannelType.Consume).QueueRetryable(_ => { });
                     };
 
-                    capturedPublishChannelModel.ModelShutdown += (sender, args) =>
+                    capturedPublishChannelModel.ModelShutdown += (_, _) =>
                     {
                         lock (connectionLock)
                         {

Tapeti/Connection/TapetiSubscriber.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using Tapeti.Config;
+using Tapeti.Helpers;
 
 namespace Tapeti.Connection
 {
@@ -13,7 +14,7 @@ namespace Tapeti.Connection
         private readonly Func<ITapetiClient> clientFactory;
         private readonly ITapetiConfig config;
         private bool consuming;
-        private readonly List<TapetiConsumerTag> consumerTags = new List<TapetiConsumerTag>();
+        private readonly List<TapetiConsumerTag> consumerTags = new();
 
         private CancellationTokenSource initializeCancellationTokenSource;
 
@@ -149,7 +150,7 @@ namespace Tapeti.Connection
                 var queueName = group.Key;
                 var consumer = new TapetiConsumer(cancellationToken, config, queueName, group);
 
-                return await clientFactory().Consume(cancellationToken, queueName, consumer);
+                return await clientFactory().Consume(queueName, consumer, cancellationToken);
             }))).Where(t => t != null));
         }
 
@@ -165,9 +166,10 @@ namespace Tapeti.Connection
             {
                 public string QueueName;
                 public List<Type> MessageClasses;
+                public IReadOnlyDictionary<string, string> Arguments;
             }
 
-            private readonly Dictionary<string, List<DynamicQueueInfo>> dynamicQueues = new Dictionary<string, List<DynamicQueueInfo>>();
+            private readonly Dictionary<string, List<DynamicQueueInfo>> dynamicQueues = new();
 
 
             protected CustomBindingTarget(Func<ITapetiClient> clientFactory, IRoutingKeyStrategy routingKeyStrategy, IExchangeStrategy exchangeStrategy, CancellationToken cancellationToken)
@@ -185,38 +187,38 @@ namespace Tapeti.Connection
             }
 
 
-            public abstract ValueTask BindDurable(Type messageClass, string queueName);
-            public abstract ValueTask BindDurableDirect(string queueName);
+            public abstract ValueTask BindDurable(Type messageClass, string queueName, IReadOnlyDictionary<string, string> arguments);
+            public abstract ValueTask BindDurableDirect(string queueName, IReadOnlyDictionary<string, string> arguments);
             public abstract ValueTask BindDurableObsolete(string queueName);
 
 
-            public async ValueTask<string> BindDynamic(Type messageClass, string queuePrefix = null)
+            public async ValueTask<string> BindDynamic(Type messageClass, string queuePrefix, IReadOnlyDictionary<string, string> arguments)
             {
-                var result = await DeclareDynamicQueue(messageClass, queuePrefix);
+                var result = await DeclareDynamicQueue(messageClass, queuePrefix, arguments);
                 if (!result.IsNewMessageClass) 
                     return result.QueueName;
 
                 var routingKey = RoutingKeyStrategy.GetRoutingKey(messageClass);
                 var exchange = ExchangeStrategy.GetExchange(messageClass);
 
-                await ClientFactory().DynamicQueueBind(CancellationToken, result.QueueName, new QueueBinding(exchange, routingKey));
+                await ClientFactory().DynamicQueueBind(result.QueueName, new QueueBinding(exchange, routingKey), CancellationToken);
 
                 return result.QueueName;
             }
 
 
-            public async ValueTask<string> BindDynamicDirect(Type messageClass, string queuePrefix = null)
+            public async ValueTask<string> BindDynamicDirect(Type messageClass, string queuePrefix, IReadOnlyDictionary<string, string> arguments)
             {
-                var result = await DeclareDynamicQueue(messageClass, queuePrefix);
+                var result = await DeclareDynamicQueue(messageClass, queuePrefix, arguments);
                 return result.QueueName;
             }
 
 
-            public async ValueTask<string> BindDynamicDirect(string queuePrefix = null)
+            public async ValueTask<string> BindDynamicDirect(string queuePrefix, IReadOnlyDictionary<string, string> arguments)
             {
                 // If we don't know the routing key, always create a new queue to ensure there is no overlap.
                 // Keep it out of the dynamicQueues dictionary, so it can't be re-used later on either.
-                return await ClientFactory().DynamicQueueDeclare(CancellationToken, queuePrefix);
+                return await ClientFactory().DynamicQueueDeclare(queuePrefix, arguments, CancellationToken);
             }
 
 
@@ -226,7 +228,7 @@ namespace Tapeti.Connection
                 public bool IsNewMessageClass;
             }
 
-            private async Task<DeclareDynamicQueueResult> DeclareDynamicQueue(Type messageClass, string queuePrefix)
+            private async Task<DeclareDynamicQueueResult> DeclareDynamicQueue(Type messageClass, string queuePrefix, IReadOnlyDictionary<string, string> arguments)
             {
                 // Group by prefix
                 var key = queuePrefix ?? "";
@@ -241,7 +243,7 @@ namespace Tapeti.Connection
                 foreach (var existingQueueInfo in prefixQueues)
                 {
                     // ReSharper disable once InvertIf
-                    if (!existingQueueInfo.MessageClasses.Contains(messageClass))
+                    if (!existingQueueInfo.MessageClasses.Contains(messageClass) && existingQueueInfo.Arguments.NullSafeSameValues(arguments))
                     {
                         // Allow this routing key in the existing dynamic queue
                         var result = new DeclareDynamicQueueResult
@@ -258,11 +260,12 @@ namespace Tapeti.Connection
                 }
 
                 // Declare a new queue
-                var queueName = await ClientFactory().DynamicQueueDeclare(CancellationToken, queuePrefix);
+                var queueName = await ClientFactory().DynamicQueueDeclare(queuePrefix, arguments, CancellationToken);
                 var queueInfo = new DynamicQueueInfo
                 {
                     QueueName = queueName,
-                    MessageClasses = new List<Type> { messageClass }
+                    MessageClasses = new List<Type> { messageClass },
+                    Arguments = arguments
                 };
 
                 prefixQueues.Add(queueInfo);
@@ -278,8 +281,15 @@ namespace Tapeti.Connection
 
         private class DeclareDurableQueuesBindingTarget : CustomBindingTarget
         {
-            private readonly Dictionary<string, List<Type>> durableQueues = new Dictionary<string, List<Type>>();
-            private readonly HashSet<string> obsoleteDurableQueues = new HashSet<string>();
+            private struct DurableQueueInfo
+            {
+                public List<Type> MessageClasses;
+                public IReadOnlyDictionary<string, string> Arguments;
+            }
+
+
+            private readonly Dictionary<string, DurableQueueInfo> durableQueues = new();
+            private readonly HashSet<string> obsoleteDurableQueues = new();
 
 
             public DeclareDurableQueuesBindingTarget(Func<ITapetiClient> clientFactory, IRoutingKeyStrategy routingKeyStrategy, IExchangeStrategy exchangeStrategy, CancellationToken cancellationToken) : base(clientFactory, routingKeyStrategy, exchangeStrategy, cancellationToken)
@@ -287,29 +297,50 @@ namespace Tapeti.Connection
             }
 
 
-            public override ValueTask BindDurable(Type messageClass, string queueName)
+            public override ValueTask BindDurable(Type messageClass, string queueName, IReadOnlyDictionary<string, string> arguments)
             {
                 // Collect the message classes per queue so we can determine afterwards
                 // if any of the bindings currently set on the durable queue are no
                 // longer valid and should be removed.
-                if (!durableQueues.TryGetValue(queueName, out var messageClasses))
+                if (!durableQueues.TryGetValue(queueName, out var durableQueueInfo))
                 {
-                    durableQueues.Add(queueName, new List<Type>
+                    durableQueues.Add(queueName, new DurableQueueInfo
+                    {
+                        MessageClasses = new List<Type>
                         {
                             messageClass
+                        },
+                        Arguments = arguments
                     });
                 }
-                else if (!messageClasses.Contains(messageClass))
-                    messageClasses.Add(messageClass);
+                else
+                {
+                    if (!durableQueueInfo.Arguments.NullSafeSameValues(arguments))
+                        throw new TopologyConfigurationException($"Multiple conflicting QueueArguments attributes specified for queue {queueName}");
+
+                    if (!durableQueueInfo.MessageClasses.Contains(messageClass))
+                        durableQueueInfo.MessageClasses.Add(messageClass);
+                }
                 
                 return default;
         }
 
 
-            public override ValueTask BindDurableDirect(string queueName)
+            public override ValueTask BindDurableDirect(string queueName, IReadOnlyDictionary<string, string> arguments)
             {
-                if (!durableQueues.ContainsKey(queueName))
-                    durableQueues.Add(queueName, new List<Type>());
+                if (!durableQueues.TryGetValue(queueName, out var durableQueueInfo))
+                {
+                    durableQueues.Add(queueName, new DurableQueueInfo
+                    {
+                        MessageClasses = new List<Type>(),
+                        Arguments = arguments
+                    });
+                }
+                else
+                {
+                    if (!durableQueueInfo.Arguments.NullSafeSameValues(arguments))
+                        throw new TopologyConfigurationException($"Multiple conflicting QueueArguments attributes specified for queue {queueName}");
+                }
 
                 return default;
             }
@@ -334,7 +365,7 @@ namespace Tapeti.Connection
             {
                 await Task.WhenAll(durableQueues.Select(async queue =>
                 {
-                    var bindings = queue.Value.Select(messageClass =>
+                    var bindings = queue.Value.MessageClasses.Select(messageClass =>
                     {
                         var exchange = ExchangeStrategy.GetExchange(messageClass);
                         var routingKey = RoutingKeyStrategy.GetRoutingKey(messageClass);
@@ -342,7 +373,7 @@ namespace Tapeti.Connection
                         return new QueueBinding(exchange, routingKey);
                     });
 
-                    await client.DurableQueueDeclare(CancellationToken, queue.Key, bindings);
+                    await client.DurableQueueDeclare(queue.Key, bindings, queue.Value.Arguments, CancellationToken);
                 }));
             }
 
@@ -351,7 +382,7 @@ namespace Tapeti.Connection
             {
                 await Task.WhenAll(obsoleteDurableQueues.Except(durableQueues.Keys).Select(async queue =>
                 {
-                    await client.DurableQueueDelete(CancellationToken, queue);
+                    await client.DurableQueueDelete(queue, true, CancellationToken);
                 }));
             }
         }
@@ -359,7 +390,7 @@ namespace Tapeti.Connection
 
         private class PassiveDurableQueuesBindingTarget : CustomBindingTarget
         {
-            private readonly HashSet<string> durableQueues = new HashSet<string>();
+            private readonly HashSet<string> durableQueues = new();
 
 
             public PassiveDurableQueuesBindingTarget(Func<ITapetiClient> clientFactory, IRoutingKeyStrategy routingKeyStrategy, IExchangeStrategy exchangeStrategy, CancellationToken cancellationToken) : base(clientFactory, routingKeyStrategy, exchangeStrategy, cancellationToken)
@@ -367,14 +398,14 @@ namespace Tapeti.Connection
             }
 
 
-            public override async ValueTask BindDurable(Type messageClass, string queueName)
+            public override async ValueTask BindDurable(Type messageClass, string queueName, IReadOnlyDictionary<string, string> arguments)
             {
-                await VerifyDurableQueue(queueName);
+                await VerifyDurableQueue(queueName, arguments);
             }
 
-            public override async ValueTask BindDurableDirect(string queueName)
+            public override async ValueTask BindDurableDirect(string queueName, IReadOnlyDictionary<string, string> arguments)
             {
-                await VerifyDurableQueue(queueName);
+                await VerifyDurableQueue(queueName, arguments);
             }
 
             public override ValueTask BindDurableObsolete(string queueName)
@@ -383,12 +414,12 @@ namespace Tapeti.Connection
             }
 
 
-            private async Task VerifyDurableQueue(string queueName)
+            private async Task VerifyDurableQueue(string queueName, IReadOnlyDictionary<string, string> arguments)
             {
                 if (!durableQueues.Add(queueName))
                     return;
 
-                await ClientFactory().DurableQueueVerify(CancellationToken, queueName);
+                await ClientFactory().DurableQueueVerify(queueName, arguments, CancellationToken);
             }
         }
 
@@ -400,12 +431,12 @@ namespace Tapeti.Connection
             }
 
 
-            public override ValueTask BindDurable(Type messageClass, string queueName)
+            public override ValueTask BindDurable(Type messageClass, string queueName, IReadOnlyDictionary<string, string> arguments)
             {
                 return default;
             }
 
-            public override ValueTask BindDurableDirect(string queueName)
+            public override ValueTask BindDurableDirect(string queueName, IReadOnlyDictionary<string, string> arguments)
             {
                 return default;
             }

Tapeti/Default/ConsoleLogger.cs

@@ -81,7 +81,13 @@ namespace Tapeti.Default
         }
 
         /// <inheritdoc />
-        public void QueueExistsWarning(string queueName, Dictionary<string, string> arguments)
+        public void QueueExistsWarning(string queueName, IReadOnlyDictionary<string, string> existingArguments, IReadOnlyDictionary<string, string> arguments)
+        {
+            Console.WriteLine($"[Tapeti] Durable queue {queueName} exists with incompatible x-arguments ({GetArgumentsText(existingArguments)} vs. {GetArgumentsText(arguments)}) and will not be redeclared, queue will be consumed as-is");
+        }
+
+
+        private static string GetArgumentsText(IReadOnlyDictionary<string, string> arguments)
         {
             var argumentsText = new StringBuilder();
             foreach (var pair in arguments)
@@ -92,9 +98,10 @@ namespace Tapeti.Default
                 argumentsText.Append($"{pair.Key} = {pair.Value}");
             }
 
-            Console.WriteLine($"[Tapeti] Durable queue {queueName} exists with incompatible x-arguments ({argumentsText}) and will not be redeclared, queue will be consumed as-is");
+            return argumentsText.ToString();
         }
 
+
         /// <inheritdoc />
         public void QueueBind(string queueName, bool durable, string exchange, string routingKey)
         {

Tapeti/Default/ControllerBindingContext.cs

@@ -9,7 +9,7 @@ namespace Tapeti.Default
     internal class ControllerBindingContext : IControllerBindingContext
     {
         private BindingTargetMode? bindingTargetMode;
-        private readonly List<IControllerMiddlewareBase> middleware = new List<IControllerMiddlewareBase>();
+        private readonly List<IControllerMiddlewareBase> middleware = new();
         private readonly List<ControllerBindingParameter> parameters;
         private readonly ControllerBindingResult result;
 

Tapeti/Default/ControllerMethodBinding.cs

@@ -117,10 +117,10 @@ namespace Tapeti.Default
                 {
                     case BindingTargetMode.Default:
                         if (bindingInfo.QueueInfo.QueueType == QueueType.Dynamic)
-                            QueueName = await target.BindDynamic(bindingInfo.MessageClass, bindingInfo.QueueInfo.Name);
+                            QueueName = await target.BindDynamic(bindingInfo.MessageClass, bindingInfo.QueueInfo.Name, bindingInfo.QueueInfo.QueueArguments);
                         else
                         {
-                            await target.BindDurable(bindingInfo.MessageClass, bindingInfo.QueueInfo.Name);
+                            await target.BindDurable(bindingInfo.MessageClass, bindingInfo.QueueInfo.Name, bindingInfo.QueueInfo.QueueArguments);
                             QueueName = bindingInfo.QueueInfo.Name;
                         }
 
@@ -128,10 +128,10 @@ namespace Tapeti.Default
 
                     case BindingTargetMode.Direct:
                         if (bindingInfo.QueueInfo.QueueType == QueueType.Dynamic)
-                            QueueName = await target.BindDynamicDirect(bindingInfo.MessageClass, bindingInfo.QueueInfo.Name);
+                            QueueName = await target.BindDynamicDirect(bindingInfo.MessageClass, bindingInfo.QueueInfo.Name, bindingInfo.QueueInfo.QueueArguments);
                         else
                         {
-                            await target.BindDurableDirect(bindingInfo.QueueInfo.Name);
+                            await target.BindDurableDirect(bindingInfo.QueueInfo.Name, bindingInfo.QueueInfo.QueueArguments);
                             QueueName = bindingInfo.QueueInfo.Name;
                         }
 
@@ -316,6 +316,10 @@ namespace Tapeti.Default
             /// </summary>
             public string Name { get; set; }
 
+            /// <summary>
+            /// Optional arguments (x-arguments) passed when declaring the queue.
+            /// </summary>
+            public IReadOnlyDictionary<string, string> QueueArguments { get; set; }
                 
             /// <summary>
             /// Determines if the QueueInfo properties contain a valid combination.

Tapeti/Default/JsonMessageSerializer.cs

@@ -16,8 +16,8 @@ namespace Tapeti.Default
         private const string ClassTypeHeader = "classType";
 
 
-        private readonly ConcurrentDictionary<string, Type> deserializedTypeNames = new ConcurrentDictionary<string, Type>();
-        private readonly ConcurrentDictionary<Type, string> serializedTypeNames = new ConcurrentDictionary<Type, string>();
+        private readonly ConcurrentDictionary<string, Type> deserializedTypeNames = new();
+        private readonly ConcurrentDictionary<Type, string> serializedTypeNames = new();
         private readonly JsonSerializerSettings serializerSettings;
 
 

Tapeti/Default/MessageContext.cs

@@ -8,7 +8,7 @@ namespace Tapeti.Default
 {
     internal class MessageContext : IMessageContext
     {
-        private readonly Dictionary<Type, IMessageContextPayload> payloads = new Dictionary<Type, IMessageContextPayload>();
+        private readonly Dictionary<Type, IMessageContextPayload> payloads = new();
 
 
         /// <inheritdoc />
@@ -117,7 +117,7 @@ namespace Tapeti.Default
         // ReSharper disable once InconsistentNaming
         public class KeyValuePayload : IMessageContextPayload, IDisposable, IAsyncDisposable
         {
-            private readonly Dictionary<string, object> items = new Dictionary<string, object>();
+            private readonly Dictionary<string, object> items = new();
             
             
             public KeyValuePayload(string key, object value)

Tapeti/Default/MessageProperties.cs

@@ -10,7 +10,7 @@ namespace Tapeti.Default
     /// </summary>
     public class MessageProperties : IMessageProperties
     {
-        private readonly Dictionary<string, string> headers = new Dictionary<string, string>();
+        private readonly Dictionary<string, string> headers = new();
 
 
         /// <inheritdoc />

Tapeti/Default/NamespaceMatchExchangeStrategy.cs

@@ -13,7 +13,7 @@ namespace Tapeti.Default
     /// </example>
     public class NamespaceMatchExchangeStrategy : IExchangeStrategy
     {
-        private static readonly Regex NamespaceRegex = new Regex("^(Messaging\\.)?(?<exchange>[^\\.]+)", RegexOptions.Compiled | RegexOptions.Singleline);
+        private static readonly Regex NamespaceRegex = new("^(Messaging\\.)?(?<exchange>[^\\.]+)", RegexOptions.Compiled | RegexOptions.Singleline);
 
 
         /// <inheritdoc />

Tapeti/Default/TypeNameRoutingKeyStrategy.cs

@@ -28,9 +28,9 @@ namespace Tapeti.Default
                     (?(?<=[A-Z])[A-Z](?=[a-z])|[A-Z])
                 )";
 
-        private static readonly Regex SeparatorRegex = new Regex(SeparatorPattern, RegexOptions.IgnorePatternWhitespace | RegexOptions.Compiled);
+        private static readonly Regex SeparatorRegex = new(SeparatorPattern, RegexOptions.IgnorePatternWhitespace | RegexOptions.Compiled);
 
-        private static readonly ConcurrentDictionary<Type, string> RoutingKeyCache = new ConcurrentDictionary<Type, string>();
+        private static readonly ConcurrentDictionary<Type, string> RoutingKeyCache = new();
 
 
         /// <inheritdoc />

Tapeti/Helpers/DictionaryHelper.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+
+namespace Tapeti.Helpers
+{
+    /// <summary>
+    /// Provides extension methods for dictionaries.
+    /// </summary>
+    public static class DictionaryHelper
+    {
+        /// <summary>
+        /// Checks if two dictionaries are considered compatible. If either is null they are considered empty.
+        /// </summary>
+        public static bool NullSafeSameValues(this IReadOnlyDictionary<string, string> arguments1, IReadOnlyDictionary<string, string> arguments2)
+        {
+            if (arguments1 == null || arguments2 == null)
+                return (arguments1 == null || arguments1.Count == 0) && (arguments2 == null || arguments2.Count == 0);
+
+            if (arguments1.Count != arguments2.Count)
+                return false;
+
+            foreach (var pair in arguments1)
+            {
+                if (!arguments2.TryGetValue(pair.Key, out var value2) || value2 != arguments1[pair.Key])
+                    return false;
+            }
+
+            return true;
+        }
+    }
+}

Tapeti/ILogger.cs

@@ -138,8 +138,9 @@ namespace Tapeti
         /// If the queue already exists but should be compatible QueueDeclare will be called instead.
         /// </summary>
         /// <param name="queueName">The name of the queue that is declared</param>
-        /// <param name="arguments">The x-arguments of the existing queue</param>
-        void QueueExistsWarning(string queueName, Dictionary<string, string> arguments);
+        /// <param name="existingArguments">The x-arguments of the existing queue</param>
+        /// <param name="arguments">The x-arguments of the queue that would be declared</param>
+        void QueueExistsWarning(string queueName, IReadOnlyDictionary<string, string> existingArguments, IReadOnlyDictionary<string, string> arguments);
 
         /// <summary>
         /// Called before a binding is added to a queue.

Tapeti/Tapeti.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net6.0;net7.0</TargetFrameworks>
@@ -42,6 +42,6 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
-    <PackageReference Include="Tapeti.Annotations" Version="3.0.0" />
+    <PackageReference Include="Tapeti.Annotations" Version="3.*-*" />
   </ItemGroup>
 </Project>

Tapeti/TapetiConfig.cs

@@ -18,7 +18,7 @@ namespace Tapeti
     public class TapetiConfig : ITapetiConfigBuilder, ITapetiConfigBuilderAccess
     {
         private Config config;
-        private readonly List<IControllerBindingMiddleware> bindingMiddleware = new List<IControllerBindingMiddleware>();
+        private readonly List<IControllerBindingMiddleware> bindingMiddleware = new();
 
 
         /// <inheritdoc />
@@ -225,9 +225,9 @@ namespace Tapeti
         /// <inheritdoc />
         internal class Config : ITapetiConfig
         {
-            private readonly ConfigFeatures features = new ConfigFeatures();
-            private readonly ConfigMiddleware middleware = new ConfigMiddleware();
-            private readonly ConfigBindings bindings = new ConfigBindings();
+            private readonly ConfigFeatures features = new();
+            private readonly ConfigMiddleware middleware = new();
+            private readonly ConfigBindings bindings = new();
 
             public IDependencyResolver DependencyResolver { get; }
             public ITapetiConfigFeatues Features => features;
@@ -291,8 +291,8 @@ namespace Tapeti
 
         internal class ConfigMiddleware : ITapetiConfigMiddleware
         {
-            private readonly List<IMessageMiddleware> messageMiddleware = new List<IMessageMiddleware>();
-            private readonly List<IPublishMiddleware> publishMiddleware = new List<IPublishMiddleware>();
+            private readonly List<IMessageMiddleware> messageMiddleware = new();
+            private readonly List<IPublishMiddleware> publishMiddleware = new();
 
 
             public IReadOnlyList<IMessageMiddleware> Message => messageMiddleware;

Tapeti/TapetiConfigControllers.cs

@@ -1,4 +1,5 @@
-using System;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
 using Tapeti.Annotations;
@@ -79,7 +80,7 @@ namespace Tapeti
                 }
 
                 var methodQueueInfo = GetQueueInfo(method) ?? controllerQueueInfo;
-                if (!(methodQueueInfo is { IsValid: true }))
+                if (methodQueueInfo is not { IsValid: true })
                     throw new TopologyConfigurationException(
                         $"Method {method.Name} or controller {controller.Name} requires a queue attribute");
 
@@ -136,12 +137,59 @@ namespace Tapeti
             if (dynamicQueueAttribute != null && durableQueueAttribute != null)
                 throw new TopologyConfigurationException($"Cannot combine static and dynamic queue attributes on controller {member.DeclaringType?.Name} method {member.Name}");
 
+
+            var queueArgumentsAttribute = member.GetCustomAttribute<QueueArgumentsAttribute>();
+
             if (dynamicQueueAttribute != null)
-                return new ControllerMethodBinding.QueueInfo { QueueType = QueueType.Dynamic, Name = dynamicQueueAttribute.Prefix };
+                return new ControllerMethodBinding.QueueInfo { QueueType = QueueType.Dynamic, Name = dynamicQueueAttribute.Prefix, QueueArguments = GetQueueArguments(queueArgumentsAttribute) };
 
             return durableQueueAttribute != null 
-                ? new ControllerMethodBinding.QueueInfo { QueueType = QueueType.Durable, Name = durableQueueAttribute.Name } 
+                ? new ControllerMethodBinding.QueueInfo { QueueType = QueueType.Durable, Name = durableQueueAttribute.Name, QueueArguments = GetQueueArguments(queueArgumentsAttribute) } 
                 : null;
         }
+
+
+        private static IReadOnlyDictionary<string, string> GetQueueArguments(QueueArgumentsAttribute queueArgumentsAttribute)
+        {
+            if (queueArgumentsAttribute == null)
+                return null;
+
+            #if NETSTANDARD2_1_OR_GREATER
+            var arguments = new Dictionary<string, string>(queueArgumentsAttribute.CustomArguments);
+            #else
+            var arguments = new Dictionary<string, string>();
+            foreach (var pair in queueArgumentsAttribute.CustomArguments)
+                arguments.Add(pair.Key, pair.Value);
+            #endif
+
+            if (queueArgumentsAttribute.MaxLength > 0)
+                arguments.Add(@"x-max-length", queueArgumentsAttribute.MaxLength.ToString());
+
+            if (queueArgumentsAttribute.MaxLengthBytes > 0)
+                arguments.Add(@"x-max-length-bytes", queueArgumentsAttribute.MaxLengthBytes.ToString());
+
+            if (queueArgumentsAttribute.MessageTTL > 0)
+                arguments.Add(@"x-message-ttl", queueArgumentsAttribute.MessageTTL.ToString());
+
+            switch (queueArgumentsAttribute.Overflow)
+            {
+                case RabbitMQOverflow.NotSpecified:
+                    break;
+                case RabbitMQOverflow.DropHead:
+                    arguments.Add(@"x-overflow", @"drop-head");
+                    break;
+                case RabbitMQOverflow.RejectPublish:
+                    arguments.Add(@"x-overflow", @"reject-publish");
+                    break;
+                case RabbitMQOverflow.RejectPublishDeadletter:
+                    arguments.Add(@"x-overflow", @"reject-publish-dlx");
+                    break;
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(queueArgumentsAttribute.Overflow), queueArgumentsAttribute.Overflow, "Unsupported Overflow value");
+            }
+
+
+            return arguments.Count > 0 ? arguments : null;
+        }
     }
 }

Tapeti/Tasks/SingleThreadTaskQueue.cs

@@ -12,10 +12,10 @@ namespace Tapeti.Tasks
     /// </summary>
     public class SingleThreadTaskQueue : IDisposable
     {
-        private readonly object previousTaskLock = new object();
+        private readonly object previousTaskLock = new();
         private Task previousTask = Task.CompletedTask;
 
-        private readonly Lazy<SingleThreadTaskScheduler> singleThreadScheduler = new Lazy<SingleThreadTaskScheduler>();
+        private readonly Lazy<SingleThreadTaskScheduler> singleThreadScheduler = new();
 
 
         /// <summary>
@@ -70,7 +70,7 @@ namespace Tapeti.Tasks
             public override int MaximumConcurrencyLevel => 1;
 
 
-            private readonly Queue<Task> scheduledTasks = new Queue<Task>();
+            private readonly Queue<Task> scheduledTasks = new();
             private bool disposed;