using System;

public class Program

{

    public static void Main()

    {

        IntPtr ptr = new IntPtr(0xff);

        Console.WriteLine(ptr.ToString());      // 255

        Console.WriteLine(ptr.ToString("x"));   // ff

        Console.WriteLine($"0x{ptr.ToString("x")}"); // 0xff

        Console.WriteLine($"0x{ptr:x}"); //0x255

    }

}