using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
public class csharpExercise
{
    static void Main(string[] args)
    {
        int num1, num2, x, y, lcm = 0;
        Console.Write("Enter the First Number : ");
        num1 = int.Parse(Console.ReadLine());
        Console.Write("Enter the Second Number : ");
        num2 = int.Parse(Console.ReadLine());
        x = num1;
        y = num2;
        while (num1 != num2)
        {
            if (num1 > num2)
            {
                num1 = num1 - num2;
            }
            else
            {
                num2 = num2 - num1;
            }
        }
        lcm = (x * y) / num1;
        Console.Write("Least Common Multiple is : " + lcm);
 
        Console.ReadLine();
    }
}

Result