test(docs):add c# 3,0 user reference examples to ci (#16060)

docs/examples/csharp/QueryExample.cs

@@ -10,7 +10,7 @@ namespace TDengineExample
         {
             IntPtr conn = GetConnection();
             // run query
-            IntPtr res = TDengine.Query(conn, "SELECT * FROM test.meters LIMIT 2");
+            IntPtr res = TDengine.Query(conn, "SELECT * FROM meters LIMIT 2");
             if (TDengine.ErrorNo(res) != 0)
             {
                 Console.WriteLine("Failed to query since: " + TDengine.Error(res));

docs/examples/node/nativeexample/connect.js

-const { options, connect } = require("@tdengine/rest");
+//A cursor also needs to be initialized in order to interact with TDengine from Node.js.
+const taos = require("@tdengine/client");
+var conn = taos.connect({
+  host: "127.0.0.1",
+  user: "root",
+  password: "taosdata",
+  config: "/etc/taos",
+  port: 0,
+});
+var cursor = conn.cursor(); // Initializing a new cursor
 
-async function test() {
-  options.path = "/rest/sql";
-  options.host = "localhost";
-  let conn = connect(options);
-  let cursor = conn.cursor();
-  try {
-    let res = await cursor.query("SELECT server_version()");
-    res.toString();
-  } catch (err) {
-    console.log(err);
-  }
-}
-test();
-
-// output:
-// server_version() |
-// ===================
-// 3.0.0.0          |
+//Close a connection
+conn.close();
\ No newline at end of file

docs/examples/node/restexample/connect.js

 const { options, connect } = require("@tdengine/rest");
 
 async function test() {
-  options.path = "/rest/sqlt";
+  options.path = "/rest/sql";
   options.host = "localhost";
   let conn = connect(options);
   let cursor = conn.cursor();

tests/docs-examples-test/csharp.sh

+#!/bin/bash
+
+set -e
+
+pgrep taosd || taosd >> /dev/null 2>&1 &
+pgrep taosadapter || taosadapter >> /dev/null 2>&1 &
+cd ../../docs/examples/csharp
+
+dotnet run --project connect.csproj
+
+taos -s "drop database if exists power"
+dotnet run --project sqlinsert.csproj
+dotnet run --project query.csproj
+dotnet run --project asyncquery.csproj
+dotnet run --project subscribe.csproj
+
+taos -s "drop topic if exists topic_example"
+taos -s "drop database if exists power"
+dotnet run --project stmtinsert.csproj
+
+taos -s "drop database if exists test"
+dotnet run --project influxdbline.csproj
+
+taos -s "drop database if exists test"
+dotnet run --project optstelnet.csproj
+
+taos -s "drop database if exists test"
+dotnet run --project optsjson.csproj
\ No newline at end of file