Added BasicNack to IModel

Author: Rob Harrop

projects/client/RabbitMQ.Client/src/client/api/IModel.cs

@@ -420,6 +420,14 @@ void BasicAck(ulong deliveryTag,
         ///<summary>(Spec method) Reject a delivered message.</summary>
         void BasicReject(ulong deliveryTag,
                          bool requeue);
+                         
+         ///<summary>Reject one or more delivered message(s).</summary>
+         [AmqpUnsupported("RabbitMQ.Client.Framing.v0_8qpid")]
+         [AmqpUnsupported("RabbitMQ.Client.Framing.v0_8")]
+         [AmqpUnsupported("RabbitMQ.Client.Framing.v0_9")]
+         void BasicNack(ulong deliveryTag,
+                        bool multiple,
+                        bool requeue);
 
         ///<summary>(Spec method)</summary>
         [AmqpMethodDoNotImplement(null)]

projects/client/RabbitMQ.Client/src/client/impl/ModelBase.cs

@@ -1037,6 +1037,10 @@ public abstract void BasicAck(ulong deliveryTag,
         public abstract void BasicReject(ulong deliveryTag,
                                          bool requeue);
 
+        public abstract void BasicNack(ulong deliveryTag,
+                                       bool multiple,
+                                       bool requeue);
+
         public abstract void BasicRecoverAsync(bool requeue);
 
         public abstract void TxSelect();