Adds Hello World Program in C#

Author: AnupKumarGupta

hello_world/hello_world.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ConsoleApplication1
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World");
+            Console.ReadLine();
+        }
+    }
+}