public void NSubtractTest()
{
MathsHelper helper = new MathsHelper();
int result = helper.sub(20, 10);
Assert.AreEqual(14, result);
}
static void Main(string[] args)
{
Console.WriteLine("Enter two number\n");
int num1, num2;
num1 = int.Parse(Console.ReadLine());
num2 = int.Parse(Console.ReadLine());
MathsHelper helper = new MathsHelper();
int x = helper.add(num1, num2);
Console.WriteLine("\n The sum of " + num1 + " and " + num2 + " is " + x);
int y = helper.sub(num1, num2);
Console.WriteLine("\n The differance between " + num1 + " and " + num2 + " is " + y);
Console.ReadKey();
}