diff --git a/README.md b/README.md
index 9283672..3839343 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,7 @@ public class PublishController : Controller
         {
             //your business code
 
-            _capBus.Publish(""xxx.services.show.time", DateTime.Now);
+            _capBus.Publish("xxx.services.show.time", DateTime.Now);
         }
 
         return Ok();
diff --git a/src/DotNetCore.CAP.MongoDB/ICapTransaction.MongoDB.cs b/src/DotNetCore.CAP.MongoDB/ICapTransaction.MongoDB.cs
index a2ae5a0..ccf7899 100644
--- a/src/DotNetCore.CAP.MongoDB/ICapTransaction.MongoDB.cs
+++ b/src/DotNetCore.CAP.MongoDB/ICapTransaction.MongoDB.cs
@@ -58,6 +58,13 @@ namespace DotNetCore.CAP
             return transaction;
         }
 
+        /// <summary>
+        /// Start the CAP transaction
+        /// </summary>
+        /// <param name="client">The <see cref="IMongoClient"/>.</param>
+        /// <param name="publisher">The <see cref="ICapPublisher"/>.</param>
+        /// <param name="autoCommit">Whether the transaction is automatically committed when the message is published</param>
+        /// <returns>The <see cref="IClientSessionHandle"/> of MongoDB transaction session object.</returns>
         public static IClientSessionHandle StartTransaction(this IMongoClient client,
             ICapPublisher publisher, bool autoCommit = false)
         {
diff --git a/src/DotNetCore.CAP.MySql/ICapTransaction.MySql.cs b/src/DotNetCore.CAP.MySql/ICapTransaction.MySql.cs
index 749622b..df72d60 100644
--- a/src/DotNetCore.CAP.MySql/ICapTransaction.MySql.cs
+++ b/src/DotNetCore.CAP.MySql/ICapTransaction.MySql.cs
@@ -74,6 +74,13 @@ namespace DotNetCore.CAP
             return transaction;
         }
 
+        /// <summary>
+        /// Start the CAP transaction
+        /// </summary>
+        /// <param name="database">The <see cref="DatabaseFacade"/>.</param>
+        /// <param name="publisher">The <see cref="ICapPublisher"/>.</param>
+        /// <param name="autoCommit">Whether the transaction is automatically committed when the message is published</param>
+        /// <returns>The <see cref="IDbContextTransaction"/> of EF dbcontext transaction object.</returns>
         public static IDbContextTransaction BeginTransaction(this DatabaseFacade database,
             ICapPublisher publisher, bool autoCommit = false)
         {
@@ -82,6 +89,13 @@ namespace DotNetCore.CAP
             return new CapEFDbTransaction(capTrans);
         }
 
+        /// <summary>
+        /// Start the CAP transaction
+        /// </summary>
+        /// <param name="dbConnection">The <see cref="IDbConnection"/>.</param>
+        /// <param name="publisher">The <see cref="ICapPublisher"/>.</param>
+        /// <param name="autoCommit">Whether the transaction is automatically committed when the message is published</param>
+        /// <returns>The <see cref="ICapTransaction"/> object.</returns>
         public static ICapTransaction BeginTransaction(this IDbConnection dbConnection,
             ICapPublisher publisher, bool autoCommit = false)
         {
diff --git a/src/DotNetCore.CAP.PostgreSql/ICapTransaction.PostgreSql.cs b/src/DotNetCore.CAP.PostgreSql/ICapTransaction.PostgreSql.cs
index 2b5b864..136d132 100644
--- a/src/DotNetCore.CAP.PostgreSql/ICapTransaction.PostgreSql.cs
+++ b/src/DotNetCore.CAP.PostgreSql/ICapTransaction.PostgreSql.cs
@@ -73,6 +73,13 @@ namespace DotNetCore.CAP
             return transaction;
         }
 
+        /// <summary>
+        /// Start the CAP transaction
+        /// </summary>
+        /// <param name="dbConnection">The <see cref="IDbConnection"/>.</param>
+        /// <param name="publisher">The <see cref="ICapPublisher"/>.</param>
+        /// <param name="autoCommit">Whether the transaction is automatically committed when the message is published</param>
+        /// <returns>The <see cref="ICapTransaction"/> object.</returns>
         public static ICapTransaction BeginTransaction(this IDbConnection dbConnection,
             ICapPublisher publisher, bool autoCommit = false)
         {
@@ -85,6 +92,13 @@ namespace DotNetCore.CAP
             return publisher.Transaction.Begin(dbTransaction, autoCommit);
         }
 
+        /// <summary>
+        /// Start the CAP transaction
+        /// </summary>
+        /// <param name="database">The <see cref="DatabaseFacade"/>.</param>
+        /// <param name="publisher">The <see cref="ICapPublisher"/>.</param>
+        /// <param name="autoCommit">Whether the transaction is automatically committed when the message is published</param>
+        /// <returns>The <see cref="IDbContextTransaction"/> of EF dbcontext transaction object.</returns>
         public static IDbContextTransaction BeginTransaction(this DatabaseFacade database,
             ICapPublisher publisher, bool autoCommit = false)
         {
diff --git a/src/DotNetCore.CAP.SqlServer/ICapTransaction.SqlServer.cs b/src/DotNetCore.CAP.SqlServer/ICapTransaction.SqlServer.cs
index 6cbba35..5ba0e54 100644
--- a/src/DotNetCore.CAP.SqlServer/ICapTransaction.SqlServer.cs
+++ b/src/DotNetCore.CAP.SqlServer/ICapTransaction.SqlServer.cs
@@ -122,6 +122,22 @@ namespace DotNetCore.CAP
             return transaction;
         }
 
+        public static ICapTransaction Begin(this ICapTransaction transaction,
+            IDbContextTransaction dbTransaction, bool autoCommit = false)
+        {
+            transaction.DbTransaction = dbTransaction;
+            transaction.AutoCommit = autoCommit;
+
+            return transaction;
+        }
+
+        /// <summary>
+        /// Start the CAP transaction
+        /// </summary>
+        /// <param name="dbConnection">The <see cref="IDbConnection"/>.</param>
+        /// <param name="publisher">The <see cref="ICapPublisher"/>.</param>
+        /// <param name="autoCommit">Whether the transaction is automatically committed when the message is published</param>
+        /// <returns>The <see cref="ICapTransaction"/> object.</returns>
         public static IDbTransaction BeginTransaction(this IDbConnection dbConnection,
             ICapPublisher publisher, bool autoCommit = false)
         {
@@ -135,15 +151,13 @@ namespace DotNetCore.CAP
             return (IDbTransaction)capTransaction.DbTransaction;
         }
 
-        public static ICapTransaction Begin(this ICapTransaction transaction,
-            IDbContextTransaction dbTransaction, bool autoCommit = false)
-        {
-            transaction.DbTransaction = dbTransaction;
-            transaction.AutoCommit = autoCommit;
-
-            return transaction;
-        }
-
+        /// <summary>
+        /// Start the CAP transaction
+        /// </summary>
+        /// <param name="database">The <see cref="DatabaseFacade"/>.</param>
+        /// <param name="publisher">The <see cref="ICapPublisher"/>.</param>
+        /// <param name="autoCommit">Whether the transaction is automatically committed when the message is published</param>
+        /// <returns>The <see cref="IDbContextTransaction"/> of EF dbcontext transaction object.</returns>
         public static IDbContextTransaction BeginTransaction(this DatabaseFacade database,
             ICapPublisher publisher, bool autoCommit = false)
         {
diff --git a/src/DotNetCore.CAP/ICapPublisher.cs b/src/DotNetCore.CAP/ICapPublisher.cs
index 9410516..eebdbd8 100644
--- a/src/DotNetCore.CAP/ICapPublisher.cs
+++ b/src/DotNetCore.CAP/ICapPublisher.cs
@@ -11,6 +11,9 @@ namespace DotNetCore.CAP
     /// </summary>
     public interface ICapPublisher
     {
+        /// <summary>
+        /// CAP transaction context object
+        /// </summary>
         ICapTransaction Transaction { get; }
 
         /// <summary>
diff --git a/src/DotNetCore.CAP/ICapTransaction.cs b/src/DotNetCore.CAP/ICapTransaction.cs
index 7134438..f73865d 100644
--- a/src/DotNetCore.CAP/ICapTransaction.cs
+++ b/src/DotNetCore.CAP/ICapTransaction.cs
@@ -1,15 +1,33 @@
-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 
 namespace DotNetCore.CAP
 {
+    /// <summary>
+    /// CAP transaction wrapper, used to wrap database transactions, provides a consistent user interface
+    /// </summary>
     public interface ICapTransaction : IDisposable
     {
+        /// <summary>
+        /// A flag is used to indicate whether the transaction is automatically committed after the message is published
+        /// </summary>
         bool AutoCommit { get; set; }
 
+        /// <summary>
+        /// Database transaction object, can be converted to a specific database transaction object or IDBTransaction when used
+        /// </summary>
         object DbTransaction { get; set; }
 
+        /// <summary>
+        /// Submit the transaction context of the CAP, we will send the message to the message queue at the time of submission
+        /// </summary>
         void Commit();
 
+        /// <summary>
+        /// We will delete the message data that has not been sstore in the buffer data of current transaction context.
+        /// </summary>
         void Rollback();
     }
-}
+}
\ No newline at end of file