} // end Main
// creates a new set by reading numbers from the user
private static IntegerSet InputSet()
{
IntegerSet temp = new IntegerSet();
Console.Write("Enter number (-1 to end): ");
int number = Convert.ToInt32(Console.ReadLine());
while (number != -1)
{
temp.InsertElement(number);
Console.Write("Enter number (-1 to end): ");
number = Convert.ToInt32(Console.ReadLine());
} // end while
return(temp);
}