using System;

using System.Diagnostics;

using System.IO; 

using System.CodeDom;

using System.CodeDom.Compiler; 

//http://metadataconsulting.blogspot.com/2020/11/CSharp-dotNet-How-to-to-get-the-literal-dotNet-string-the-internal-storage-representation-of-a-CSharp-string.html

​

public static class Program

{

    public static string ToLiteral(this string input)

    {

        using (var writer = new StringWriter())

        {

            using (var provider = CodeDomProvider.CreateProvider("CSharp"))

            {

                provider.GenerateCodeFromExpression(new CodePrimitiveExpression(input), writer, null);

​

                return writer.ToString();

            }

        }

    }

​

    public static void Main()

    {

         Stopwatch sw = new Stopwatch();

​

            string emptytest = "1 \0 \0 \u0001 \0 \0\r\n\tSOS\n1 0 0 1 0 0 1\r\nIn distress\r\n1 0 0 1 0 0 1\r\nUnicode \\u0081 on the next line\n\n\u0081";

            sw.Start();

            string output = emptytest.ToLiteral(); 

            sw.Stop();

        Console.WriteLine(emptytest);    

        Console.WriteLine("---- Literal -----");    

        Console.WriteLine(output + " in " + sw.ElapsedTicks + " ticks");

​

    }

}