Added c# example

examples/c#/example.cs

@@ -0,0 +1,27 @@
+// This file is part of mongoose web server project,
+// https://github.com/cesanta/mongoose
+
+using System;
+using System.Runtime.InteropServices;
+
+public class Program {
+  static private int RequestHandler(MongooseConnection conn) {
+    return 0;
+    /*
+    conn.write("HTTP/1.1 200 OK\r\n\r\n");
+    conn.write("Hello from C#!\n");
+    conn.write("Your user-agent is: " + conn.get_header("User-Agent") + "\n");
+    */
+  }
+
+  static void Main() {
+    Mongoose web_server = new Mongoose("c:\\", "8080",
+        new MongooseBeginRequest(RequestHandler));
+
+    Console.WriteLine("Mongoose v." + web_server.version_ + " started.");
+    Console.WriteLine("Press enter to exit program.");
+
+    // Serve requests until user presses "enter" on a keyboard
+    Console.ReadLine();
+  }
+}