Question

Please could someone provide me with a simple extension method that for example squares a number.

I have drawn up so pseudo code:

class Program

int = x
---------------------

public static int square (this int x)

return x * square

Answer 1

public static class NumberExtensions
{
  public static int Square(this int n)
  {
    return n*n;
  }
}

Now you can say:

int number=5.Square();