diff --git a/src/DotNetCore.CAP.MySql/CAP.MySqlCapOptionsExtension.cs b/src/DotNetCore.CAP.MySql/CAP.MySqlCapOptionsExtension.cs
index aa825a2..ce6fd34 100644
--- a/src/DotNetCore.CAP.MySql/CAP.MySqlCapOptionsExtension.cs
+++ b/src/DotNetCore.CAP.MySql/CAP.MySqlCapOptionsExtension.cs
@@ -28,24 +28,17 @@ namespace DotNetCore.CAP
 
             if (mysqlOptions.DbContextType != null)
             {
-                var provider = TempBuildService(services);
-                var dbContextObj = provider.GetService(mysqlOptions.DbContextType);
-                var dbContext = (DbContext)dbContextObj;
-                mysqlOptions.ConnectionString = dbContext.Database.GetDbConnection().ConnectionString;
+                services.AddSingleton(x =>
+                {
+                    var dbContext = (DbContext)x.GetService(mysqlOptions.DbContextType);
+                    mysqlOptions.ConnectionString = dbContext.Database.GetDbConnection().ConnectionString;
+                    return mysqlOptions;
+                });               
+            }
+            else
+            {
+                services.AddSingleton(mysqlOptions);
             }
-            services.AddSingleton(mysqlOptions);
-        }
-
-#if NETSTANDARD1_6
-        private IServiceProvider TempBuildService(IServiceCollection services)
-        {
-            return services.BuildServiceProvider();
-        }
-#else
-        private ServiceProvider TempBuildService(IServiceCollection services)
-        {
-            return services.BuildServiceProvider();
         }
-#endif
     }
 }
\ No newline at end of file
diff --git a/src/DotNetCore.CAP.PostgreSql/CAP.PostgreSqlCapOptionsExtension.cs b/src/DotNetCore.CAP.PostgreSql/CAP.PostgreSqlCapOptionsExtension.cs
index d3d8b14..9038dff 100644
--- a/src/DotNetCore.CAP.PostgreSql/CAP.PostgreSqlCapOptionsExtension.cs
+++ b/src/DotNetCore.CAP.PostgreSql/CAP.PostgreSqlCapOptionsExtension.cs
@@ -28,24 +28,17 @@ namespace DotNetCore.CAP
 
             if (postgreSqlOptions.DbContextType != null)
             {
-                var provider = TempBuildService(services);
-                var dbContextObj = provider.GetService(postgreSqlOptions.DbContextType);
-                var dbContext = (DbContext)dbContextObj;
-                postgreSqlOptions.ConnectionString = dbContext.Database.GetDbConnection().ConnectionString;
+                services.AddSingleton(x =>
+                {
+                    var dbContext = (DbContext)x.GetService(postgreSqlOptions.DbContextType);
+                    postgreSqlOptions.ConnectionString = dbContext.Database.GetDbConnection().ConnectionString;
+                    return postgreSqlOptions;
+                });
+            }
+            else
+            {
+                services.AddSingleton(postgreSqlOptions);
             }
-            services.AddSingleton(postgreSqlOptions);
-        }
-
-#if NETSTANDARD1_6
-        private IServiceProvider TempBuildService(IServiceCollection services)
-        {
-            return services.BuildServiceProvider();
-        }
-#else
-        private ServiceProvider TempBuildService(IServiceCollection services)
-        {
-            return services.BuildServiceProvider();
         }
-#endif
     }
 }
\ No newline at end of file
diff --git a/src/DotNetCore.CAP.RabbitMQ/CAP.RabbitMQCapOptionsExtension.cs b/src/DotNetCore.CAP.RabbitMQ/CAP.RabbitMQCapOptionsExtension.cs
index 4202570..22e2af2 100644
--- a/src/DotNetCore.CAP.RabbitMQ/CAP.RabbitMQCapOptionsExtension.cs
+++ b/src/DotNetCore.CAP.RabbitMQ/CAP.RabbitMQCapOptionsExtension.cs
@@ -21,6 +21,10 @@ namespace DotNetCore.CAP
             services.AddSingleton(options);
 
             services.AddSingleton<IConsumerClientFactory, RabbitMQConsumerClientFactory>();
+
+            services.AddSingleton<ConnectionPool>();
+            services.AddScoped(x => x.GetService<ConnectionPool>().Rent());
+
             services.AddTransient<IQueueExecutor, PublishQueueExecutor>();
         }
     }