Conversion in c# Implicit and explicit

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ImplicitExplicit

{

    class Program

    {

        static void Main(string[] args)

        {

            /*There are only two methods of type conversions:

            1 Implicit

            2 Explicit

            

            Implicit conversion:

            

             By default conversion is known as implicit conversion

             which means a lower to a higher conversion is Implicit conversion.*/

            int a=15;

            long b=a;

            Console.WriteLine(b);

            /*Explicit conversion:

             Higher to lower conversion is known as Explicit conversion. Type casting is necessary for Explicit conversion.*/

            int c=20;

            long d=c;

            int e=(int)d;

            Console.WriteLine(e);

            Console.ReadKey();

        }

    }

}