diff --git a/src/DotNetCore.CAP/Abstractions/ConsumerContext.cs b/src/DotNetCore.CAP/Abstractions/ConsumerContext.cs
index e700541..cd628aa 100644
--- a/src/DotNetCore.CAP/Abstractions/ConsumerContext.cs
+++ b/src/DotNetCore.CAP/Abstractions/ConsumerContext.cs
@@ -3,16 +3,30 @@ using DotNetCore.CAP.Infrastructure;
 
 namespace DotNetCore.CAP.Abstractions
 {
+    /// <summary>
+    /// A context for consumers, it used to be provider wapper of method description and received message.
+    /// </summary>
     public class ConsumerContext
     {
+        /// <summary>
+        /// create a new instance of  <see cref="ConsumerContext"/> .
+        /// </summary>
+        /// <param name="descriptor">consumer method descriptor. </param>
+        /// <param name="message"> reveied message.</param>
         public ConsumerContext(ConsumerExecutorDescriptor descriptor, DeliverMessage message)
         {
             ConsumerDescriptor = descriptor ?? throw new ArgumentNullException(nameof(descriptor));
             DeliverMessage = message ?? throw new ArgumentNullException(nameof(message));
         }
 
+        /// <summary>
+        /// a descriptor of consumer information need to be performed.
+        /// </summary>
         public ConsumerExecutorDescriptor ConsumerDescriptor { get; set; }
 
+        /// <summary>
+        /// consumer reveived message.
+        /// </summary>
         public DeliverMessage DeliverMessage { get; set; }
     }
 }
\ No newline at end of file
diff --git a/src/DotNetCore.CAP/Abstractions/ConsumerExecutorDescriptor.cs b/src/DotNetCore.CAP/Abstractions/ConsumerExecutorDescriptor.cs
index ef50933..e95e337 100644
--- a/src/DotNetCore.CAP/Abstractions/ConsumerExecutorDescriptor.cs
+++ b/src/DotNetCore.CAP/Abstractions/ConsumerExecutorDescriptor.cs
@@ -2,6 +2,9 @@
 
 namespace DotNetCore.CAP.Abstractions
 {
+    /// <summary>
+    /// A descriptor of user definition method.
+    /// </summary>
     public class ConsumerExecutorDescriptor
     {
         public MethodInfo MethodInfo { get; set; }
diff --git a/src/DotNetCore.CAP/Abstractions/ConsumerInvokerContext.cs b/src/DotNetCore.CAP/Abstractions/ConsumerInvokerContext.cs
index cedea1a..613ed97 100644
--- a/src/DotNetCore.CAP/Abstractions/ConsumerInvokerContext.cs
+++ b/src/DotNetCore.CAP/Abstractions/ConsumerInvokerContext.cs
@@ -2,6 +2,9 @@
 
 namespace DotNetCore.CAP.Abstractions
 {
+    /// <summary>
+    /// a context of consumer invoker.
+    /// </summary>
     public class ConsumerInvokerContext
     {
         public ConsumerInvokerContext(ConsumerContext consumerContext)
diff --git a/src/DotNetCore.CAP/Abstractions/IConsumerInvoker.cs b/src/DotNetCore.CAP/Abstractions/IConsumerInvoker.cs
index ede8fa3..00f37d6 100644
--- a/src/DotNetCore.CAP/Abstractions/IConsumerInvoker.cs
+++ b/src/DotNetCore.CAP/Abstractions/IConsumerInvoker.cs
@@ -2,8 +2,14 @@
 
 namespace DotNetCore.CAP.Abstractions
 {
+    /// <summary>
+    /// Perform user definition method of consumers.
+    /// </summary>
     public interface IConsumerInvoker
     {
+        /// <summary>
+        /// begin to invoke method.
+        /// </summary>
         Task InvokeAsync();
     }
 }
\ No newline at end of file
diff --git a/src/DotNetCore.CAP/Abstractions/ModelBinding/IModelBinder.cs b/src/DotNetCore.CAP/Abstractions/ModelBinding/IModelBinder.cs
index 3b87c51..dbfa344 100644
--- a/src/DotNetCore.CAP/Abstractions/ModelBinding/IModelBinder.cs
+++ b/src/DotNetCore.CAP/Abstractions/ModelBinding/IModelBinder.cs
@@ -2,8 +2,28 @@
 
 namespace DotNetCore.CAP.Abstractions.ModelBinding
 {
+    /// <summary>
+    /// Defines an interface for model binders.
+    /// </summary>
     public interface IModelBinder
     {
+        /// <summary>
+        /// Attempts to bind a model.
+        /// </summary>
+        /// <param name="bindingContext">The <see cref="ModelBindingContext"/>.</param>
+        /// <returns>
+        /// <para>
+        /// A <see cref="Task"/> which will complete when the model binding process completes.
+        /// </para>
+        /// <para>
+        /// If model binding was successful, the <see cref="ModelBindingContext.Result"/> should have
+        /// <see cref="ModelBindingResult.IsModelSet"/> set to <c>true</c>.
+        /// </para>
+        /// <para>
+        /// A model binder that completes successfully should set <see cref="ModelBindingContext.Result"/> to
+        /// a value returned from <see cref="ModelBindingResult.Success"/>. 
+        /// </para>
+        /// </returns>
         Task BindModelAsync(ModelBindingContext bindingContext);
     }
 }
\ No newline at end of file
diff --git a/src/DotNetCore.CAP/Abstractions/ModelBinding/ModelBindingContext.cs b/src/DotNetCore.CAP/Abstractions/ModelBinding/ModelBindingContext.cs
index 9b57fe1..0715074 100644
--- a/src/DotNetCore.CAP/Abstractions/ModelBinding/ModelBindingContext.cs
+++ b/src/DotNetCore.CAP/Abstractions/ModelBinding/ModelBindingContext.cs
@@ -3,18 +3,45 @@ using Microsoft.Extensions.Primitives;
 
 namespace DotNetCore.CAP.Abstractions.ModelBinding
 {
+    // <summary>
+    /// A context that contains operating information for model binding and validation.
+    /// </summary>
     public class ModelBindingContext
     {
+        /// <summary>
+        /// Gets or sets the model value for the current operation.
+        /// </summary>
+        /// <remarks>
+        /// The <see cref="Model"/> will typically be set for a binding operation that works
+        /// against a pre-existing model object to update certain properties.
+        /// </remarks>
         public object Model { get; set; }
 
+        /// <summary>
+        /// Gets or sets the name of the model. 
+        /// </summary>
         public string ModelName { get; set; }
 
+        /// <summary>
+        /// Gets or sets the type of the model.
+        /// </summary>
         public Type ModelType { get; set; }
 
+        /// <summary>
+        ///  Gets  or sets the values of the model.
+        /// </summary>
         public StringValues Values { get; set; }
 
+        /// <summary>
+        /// <para>
+        /// Gets or sets a result which represents the result of the model binding process.
+        /// </para>
+        /// </summary>
         public object Result { get; set; }
 
+        /// <summary>
+        /// Creates a new <see cref="ModelBindingContext"/> for top-level model binding operation.
+        /// </summary>
         public static ModelBindingContext CreateBindingContext(string values, string modelName, Type modelType)
         {
             return new ModelBindingContext()
diff --git a/src/DotNetCore.CAP/Abstractions/TopicAttribute.cs b/src/DotNetCore.CAP/Abstractions/TopicAttribute.cs
index 195af85..a4a8cb0 100644
--- a/src/DotNetCore.CAP/Abstractions/TopicAttribute.cs
+++ b/src/DotNetCore.CAP/Abstractions/TopicAttribute.cs
@@ -2,6 +2,9 @@
 
 namespace DotNetCore.CAP.Abstractions
 {
+    /// <summary>
+    /// An abstract attribute that for  kafka attribute or rabbitmq attribute
+    /// </summary>
     [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = true)]
     public abstract class TopicAttribute : Attribute
     {
@@ -12,11 +15,17 @@ namespace DotNetCore.CAP.Abstractions
             this._name = topicName;
         }
 
+        /// <summary>
+        /// topic or exchange route key name.
+        /// </summary>
         public string Name
         {
             get { return _name; }
         }
 
+        /// <summary>
+        /// the consumer group.
+        /// </summary>
         public string GroupOrExchange { get; set; }
 
         public bool IsOneWay { get; set; }
diff --git a/src/DotNetCore.CAP/CAP.Builder.cs b/src/DotNetCore.CAP/CAP.Builder.cs
index 8ca1931..1273582 100644
--- a/src/DotNetCore.CAP/CAP.Builder.cs
+++ b/src/DotNetCore.CAP/CAP.Builder.cs
@@ -49,7 +49,7 @@ namespace Microsoft.Extensions.DependencyInjection
             return AddSingleton<IJob, T>();
         }
 
-        public virtual CapBuilder AddProducerClient<T>()
+        public virtual CapBuilder AddProducerService<T>()
             where T : class, ICapProducerService
         {
             return AddScoped(typeof(ICapProducerService), typeof(T));
diff --git a/src/DotNetCore.CAP/DotNetCore.CAP.csproj b/src/DotNetCore.CAP/DotNetCore.CAP.csproj
index 0554fe9..7875f81 100644
--- a/src/DotNetCore.CAP/DotNetCore.CAP.csproj
+++ b/src/DotNetCore.CAP/DotNetCore.CAP.csproj
@@ -19,7 +19,7 @@
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="1.1.2" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="1.1.1" />
     <PackageReference Include="ncrontab" Version="3.3.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="10.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
     <PackageReference Include="System.Threading.ThreadPool" Version="4.3.0" />
   </ItemGroup>