using System;

using System.Web;

using System.Web.Security.AntiXss;

public class Program

{

    public static void Main()

    {

        var text = "oh\r\n\r\n\r\n\r\nnoes\r\n<script>alert(1)</script>";

        //HtmlEncode

        var enc = HttpUtility.HtmlEncode(text);

        Console.WriteLine(enc);

        var enc2 = AntiXssEncoder.HtmlEncode(text, false);

        Console.WriteLine("/r/n" + enc2);

    }

}