static void Main(string[] args)
{
MathOps m = new MathOps();
Console.WriteLine($"Add = {m.Add(30,40)}");
Console.WriteLine($"Mult = {m.Mult(30, 40)}");
Console.WriteLine($"Add = {m.AddSquare(30, 40)}");
Console.WriteLine($"Mult = {m.MultSquare(30, 40)}");
string str = "James Bond";
Console.WriteLine($"Length of {str} = {str.Length}");
Console.WriteLine($"Reverse of {str} = {str.ExtReverse()}");
Console.ReadLine();
}
public static int MultSquare(this MathOps m, int x, int y)
{
return((x * x) * (y * y));
}
public static int AddSquare(this MathOps m, int x, int y)
{
return((x * x) + (y * y));
}