public static void Main()
var input = "test1\ntest2\\n\\\\test3";
var escaped = input.Replace("\\", "\\\\").Replace("\n", "\\n");
var guid = Guid.NewGuid().ToString();
var unescaped = escaped.Replace("\\\\", guid).Replace("\\n", "\n").Replace(guid, "\\\\");
Console.WriteLine(input);
Console.WriteLine("===================================================================");
Console.WriteLine(escaped);
Console.WriteLine("===================================================================");
Console.WriteLine(unescaped);