Letter Meaning
X or x Hexadecimal
using System;
using System.Text;
using System.Globalization;
class Sample
{
public static void Main()
{
Console.WriteLine("{0:X}", 20);
Console.WriteLine("{0:x}", 20);
Console.WriteLine("{0:X4}", 20);
}
}
The output:
14
14
0014
X for uppercase hex digits; x for lowercase hex digits.
X or x is for integrals only.