TestMath.cs

To test the below, add a new class TestMath.cs and write the following code:

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

namespace CSharpConsole
{
    class TestMath
    {
        static void Main()
        {
            Math m = new Math(100,50);
            m.Add(100, 50);
            m.Sub(60, 30);
            m.Mul(10, 20);
            m.Div(50, 25);
            Console.ReadLine();
           
        }
    }
}