How to find if the Year is Leap Year or Not in C# ?

using System;   
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AbundantcodeConsoleApp
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            // How to Check if the year is leap year or not
            int input = 1996;
            if(input %100 ==0)
            {
                if(input%400==0)
                {
                    Console.WriteLine("Leap Year");
                }
                else
                {
                    Console.WriteLine("Not a Leap Year");
                }
            }
            else
            {
                if(input %4 ==0)
                {
                    Console.WriteLine("Leap Year");
                }
                else
                {
                    Console.WriteLine("Not a Leap Year");
                }
            }
            Console.ReadLine();
        }
    }    
}