add summary comments.

src/DotNetCore.CAP/Abstractions/IContentSerializer.cs

@@ -3,19 +3,58 @@ using DotNetCore.CAP.Models;
 
 namespace DotNetCore.CAP.Abstractions
 {
+    /// <summary>
+    /// Message content serializer.
+    /// <para>By default, CAP will use Json as a serializer, and you can customize this interface to achieve serialization of other methods.</para> 
+    /// </summary>
     public interface IContentSerializer
     {
-        string Serialize<T>(T obj);
+        /// <summary>
+        /// Serializes the specified object to a string.
+        /// </summary>
+        /// <typeparam name="T"> The type of the value being serialized.</typeparam>
+        /// <param name="value">The object to serialize.</param>
+        /// <returns>A string representation of the object.</returns>
+        string Serialize<T>(T value);
 
-        T DeSerialize<T>(string content);
+        /// <summary>
+        /// Deserializes the string to the specified .NET type.
+        /// </summary>
+        /// <typeparam name="T">The type of the object to deserialize to.</typeparam>
+        /// <param name="value">The content string to deserialize.</param>
+        /// <returns>The deserialized object from the string.</returns>
+        T DeSerialize<T>(string value);
 
-        object DeSerialize(string content, Type type);
+        /// <summary>
+        /// Deserializes the string to the specified .NET type.
+        /// </summary>
+        /// <param name="value">The string to deserialize.</param>
+        /// <param name="type">The type of the object to deserialize to.</param>
+        /// <returns>The deserialized object from the string.</returns>
+        object DeSerialize(string value, Type type);
     }
 
+    /// <summary>
+    /// CAP message content wapper.
+    /// <para>You can customize the message body filed name of the wrapper or add fields that you interested.</para>
+    /// </summary>
+    /// <remarks>
+    /// We use the wrapper to provide some additional information for the message content,which is important for CAP。
+    /// Typically, we may need to customize the field display name of the message, 
+    /// which includes interacting with other message components, which can be adapted in this manner
+    /// </remarks>
     public interface IMessagePacker
     {
+        /// <summary>
+        /// Package a message object
+        /// </summary>
+        /// <param name="obj">The obj message to be packed.</param>
         string Pack(CapMessage obj);
 
+        /// <summary>
+        /// Unpack a message strings to <see cref="CapMessage"/> object.
+        /// </summary>
+        /// <param name="packingMessage">The string of packed message.</param>
         CapMessage UnPack(string packingMessage);
     } 
 }
\ No newline at end of file

src/DotNetCore.CAP/Abstractions/IModelBinderFactory.cs

@@ -3,8 +3,16 @@ using DotNetCore.CAP.Abstractions.ModelBinding;
 
 namespace DotNetCore.CAP.Abstractions
 {
+    /// <summary>
+    /// Model binder factory.
+    /// </summary>
     public interface IModelBinderFactory
     {
+        /// <summary>
+        /// Create a model binder by parameter.
+        /// </summary>
+        /// <param name="parameter">The method parameter info</param>
+        /// <returns>A model binder instance.</returns>
         IModelBinder CreateBinder(ParameterInfo parameter);
     }
 }
\ No newline at end of file

src/DotNetCore.CAP/Abstractions/ISubscriberExecutor.cs

@@ -3,8 +3,15 @@ using DotNetCore.CAP.Models;
 
 namespace DotNetCore.CAP.Abstractions
 {
+    /// <summary>
+    /// Consumer method executor.
+    /// </summary>
     public interface ISubscriberExecutor
     {
+        /// <summary>
+        /// Execute the consumer method.
+        /// </summary>
+        /// <param name="receivedMessage">The received message.</param>
         Task<OperateResult> ExecuteAsync(CapReceivedMessage receivedMessage);
     }
 }

src/DotNetCore.CAP/Abstractions/TopicAttribute.cs

@@ -15,7 +15,7 @@ namespace DotNetCore.CAP.Abstractions
         }
 
         /// <summary>
-        /// topic or exchange route key name.
+        /// Topic or exchange route key name.
         /// </summary>
         public string Name { get; }