diff --git a/Modbus.Net/Modbus.Net/TaskManager.cs b/Modbus.Net/Modbus.Net/TaskManager.cs
index 5b39cb6..b9dacc6 100644
--- a/Modbus.Net/Modbus.Net/TaskManager.cs
+++ b/Modbus.Net/Modbus.Net/TaskManager.cs
@@ -22,6 +22,13 @@ namespace Modbus.Net
         Id
     }
 
+    /// <summary>
+    ///     返回结果的定义类
+    /// </summary>
+    public class TaskReturnDef : TaskReturnDef<string>
+    {        
+    }
+
     /// <summary>
     ///     返回结果的定义类
     /// </summary>