static void Main(string[] args)
{
Arithmetic a1 = new Arithmetic();
int a, b;
Console.WriteLine("Enter Integer a");
a = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Enter Integer b");
b = Convert.ToInt32(Console.ReadLine());
a1.MathsChoice();
int c = Convert.ToInt16(Console.ReadLine());
switch (c)
{
case 1:
Console.WriteLine("Addition Of Two Numbers : " + (a + b));
break;
case 2:
Console.WriteLine("Subtraction Of Two Numbers : " + (a - b));
break;
case 3:
Console.WriteLine("Multiplicaion Of Two Numbers : " + (a * b));
break;
case 4:
Console.WriteLine("Division Of Two Numbers : " + (a / b));
break;
}
Console.ReadKey();
}