diff --git a/docs/examples/csharp/wsConnect/Program.cs b/docs/examples/csharp/wsConnect/Program.cs
index 2e89372c3e..f9a56c842f 100644
--- a/docs/examples/csharp/wsConnect/Program.cs
+++ b/docs/examples/csharp/wsConnect/Program.cs
@@ -9,9 +9,10 @@ namespace Examples
         {
             string DSN = "ws://root:taosdata@127.0.0.1:6041/test";
             IntPtr wsConn = LibTaosWS.WSConnectWithDSN(DSN);
+  
             if (wsConn == IntPtr.Zero)
             {
-                throw new Exception($"get WS connection failed,reason:{LibTaosWS.WSErrorStr(IntPtr.Zero)} code:{LibTaosWS.WSErrorNo(IntPtr.Zero)}");
+                throw new Exception("get WS connection failed");
             }
             else
             {
diff --git a/docs/examples/csharp/wsInsert/Program.cs b/docs/examples/csharp/wsInsert/Program.cs
index 4cd812cda9..1f2d0a6725 100644
--- a/docs/examples/csharp/wsInsert/Program.cs
+++ b/docs/examples/csharp/wsInsert/Program.cs
@@ -13,7 +13,7 @@ namespace Examples
             // Assert if connection is validate
             if (wsConn == IntPtr.Zero)
             {
-                throw new Exception($"get WS connection failed,reason:{LibTaosWS.WSErrorStr(IntPtr.Zero)} code:{LibTaosWS.WSErrorNo(IntPtr.Zero)}");
+                throw new Exception("get WS connection failed");
             }
             else
             {
diff --git a/docs/examples/csharp/wsQuery/Program.cs b/docs/examples/csharp/wsQuery/Program.cs
index de5591aa53..a220cae903 100644
--- a/docs/examples/csharp/wsQuery/Program.cs
+++ b/docs/examples/csharp/wsQuery/Program.cs
@@ -13,7 +13,7 @@ namespace Examples
             IntPtr wsConn = LibTaosWS.WSConnectWithDSN(DSN);
             if (wsConn == IntPtr.Zero)
             {
-                throw new Exception($"get WS connection failed,reason:{LibTaosWS.WSErrorStr(IntPtr.Zero)} code:{LibTaosWS.WSErrorNo(IntPtr.Zero)}");
+                throw new Exception("get WS connection failed");
             }
             else
             {
diff --git a/docs/examples/csharp/wsStmt/Program.cs b/docs/examples/csharp/wsStmt/Program.cs
index 54de77ec1f..8af807ec39 100644
--- a/docs/examples/csharp/wsStmt/Program.cs
+++ b/docs/examples/csharp/wsStmt/Program.cs
@@ -21,7 +21,7 @@ namespace Examples
             IntPtr wsConn = LibTaosWS.WSConnectWithDSN(DSN);
             if (wsConn == IntPtr.Zero)
             {
-                throw new Exception($"get WS connection failed,reason:{LibTaosWS.WSErrorStr(IntPtr.Zero)} code:{LibTaosWS.WSErrorNo(IntPtr.Zero)}");
+                throw new Exception($"get WS connection failed");
             }
             else
             {