question on default in switch statement

[aaronmk2]

I always thought that if I used a switch statement and enter an option not specified the default would catch it. However, if I press enter then enter an option I get a run time error. How would I fix this? I am only including part of the code, if you want to see the rest I can post the rest.

public enum Options : byte
        {
            newZ = 1,
            display,
            Exit
        }
        static void displayMenu()
        {
            Console.WriteLine("Enter newZ to try new integers");
            Console.WriteLine("Enter display to see which Range Checker has the most Z's under the range");
            Console.WriteLine("Enter Exit to exit");
        }
        static void Main(string[] args)
        {
            RangeChecker[] rangeChecker = new RangeChecker[20];
            Random random = new Random();
            const int SIZE = 20;
            
            initialize(rangeChecker, SIZE);
            order(rangeChecker,  SIZE);
           
            for (; ; )
            {
                displayMenu();
                string volString = Console.ReadLine();
                Options options = (Options)Enum.Parse(typeof(Options), volString);
                switch (options)
                {
                    case Options.newZ: 
                        addZ(rangeChecker, SIZE);
                        break;
                    case Options.display:
                        display(rangeChecker, SIZE);
                        break; 
                    case Options.Exit:
                        Console.WriteLine("Goodbye");
                        System.Environment.Exit(1);
                        break;
                    default: 
                        Console.WriteLine("entry must be addZ, display, or Exit");
                        break;

                }
            }

        }
    }
}

[Momerath]

You should get an error on line 27 where you try to parse the value. Use TryParse to ensure you have a valid value.

[aaronmk2]

I tried using TryParse, but get a error in Visual Studio
Error 1 The name 'TryParse' does not exist in the current context
Copied and pasted the code from MSDN into Visual Studio and still got the same error

[ddanbe]

Although your idea is good, it is in general not a good idea to do it in a console app. Make the user input as short as possible here use 1 or a for newZ etc. Make a menu: type 1 for this 2 for that etc.
If I as user have to type "display" and I mistype it as "dispaly" I have to do it all over again thinking of myself I cannot type!

[Mitja Bonca]

This should work:

public enum Options
        {
            newZ = 1,
            display,
            Exit
        }

        void Method2()
        {
            string volString = "1";            
            Options options = (Options)Enum.Parse(typeof(Options), volString);
            switch (options)
            {
                case Options.newZ:
                    {
                        break;
                    }
            }
        }