// A method requiring a HandleTwo delegate argument.
static int Multiply(int x, int y, HandleTwo proc)
{
// Always check the delegate for null before trying to
// invoke it.
if (proc == null)
{
// Oops! Delegate no good.
// See Bonus Chapter 2 for exceptions.
throw new ArgumentNullException("Null delegate passed.");
}
return(proc(x, y));
}
// A method requiring a HandleTwo delegate argument.
static int Multiply(int x, int y, HandleTwo proc)
{
// Always check the delegate for null before trying to
// invoke it.
if (proc == null)
{
// Oops! Delegate no good.
// See Bonus Chapter 2 for exceptions.
throw new ArgumentNullException("Null delegate passed.");
}
return proc(x, y);
}
