Tested C#

c#/helloworld.cs

@@ -1 +1,9 @@
-Console.WriteLine("Hello World!");
+//compiles and runs successfully
+using System;
+
+public class GFG {
+    static public void Main()
+    {
+        Console.WriteLine("Hello World!");
+    }
+}

c#/test.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+mcs -out:helloworld helloworld.cs
+mono helloworld