static void Main(string[] args) { MyRandomizer mr = new MyRandomizer(); string str; do { Console.WriteLine("Enter a number for the Upper Bound: "); str = Console.ReadLine(); try { double upperBound = Double.Parse(str); Console.WriteLine("Random number between 0 and {1}: {0}", mr.GetRandomNum(upperBound), upperBound); } catch (Exception e) { } }while (str != "exit"); Console.WriteLine("\nHit Enter key to continue..."); Console.ReadLine(); }