// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002423/int64-isprime

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {       

        Console.WriteLine("Prime numbers between 1 and 100 are:\n");

​

        for (Int64 val = 1; val <= 100; val++)

        {

            // C# Extension Method: Int64 - IsPrime

            if(val.IsPrime())

            {

                Console.WriteLine(val);

            }

        }

    }

}