using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main(string[] args)

    {

        var escaped = @"Data1\nData2\n";        

        var unescaped = Regex.Unescape(escaped);

        Console.WriteLine(escaped);

        Console.WriteLine("--");

        Console.WriteLine(unescaped);

    }

}