Faulty C# code

hello

I'm beginning with C# and I am using a book and here the code they give me.

I checked the syntaxe and it still not working...

Here is the code, can somebody tell me where the mistake is ???? please

using System;



public class Guess
{
  private static int getRandomNumber ( int nbr )
    {
        if (nbr > 0)
        {
           System.Random rnd = new System.Random();
            return (rnd.Next(0, nbr));
        }
        else
        {
            return 0;
        }
  }

    private static void WriteStats(string Guess, int nbr, string err)
    {
        Console.WriteLine("\nbr=================================");
        Console.WriteLine("Current Guess: {0}", Guess);
        if (err != "")
            Console.WriteLine("Enter a number from 1 to 10000");
        Console.WriteLine("==================================");

        return;
    }

    public static void Main(string[] args)
    {
        int WinningNumber = Guess.getRandomNumber(10000);
        int Guesses = 0;
        string Curr = "";
        int val = 0;
        string errMsg;

        bool cont = true;

        WriteStats(Curr, Guesses, (string)"");


        while (cont == true)
        {
            Console.Write("\nEnter Guess: ");
            Curr = Console.ReadLine();

            try  // try, catch and finally are coverd on Day 9
            {
                val = Convert.ToInt32(Curr);

                Guesses += 1;

                if (val < 0 || val > 10000)
                {
                    errMsg = "Number is out of range... Try again";
                    WriteStats(Curr, Guesses, errMsg);
                }
                else
                {
                    if (val < WinningNumber)
                    {
                        errMsg = "You guessed too low... Try again";
                        WriteStats(Curr, Guesses, errMsg);
                    }
                    else
                   
                        if (val > WinningNumber)
                        {
                            errMsg = "You guessed too high... Try again";
                            WriteStats(Curr, Guesses, errMsg);
                        }
                        else
                        {
                            Console.WriteLine("\nCurrent guess: {0}\n", val);
                            Console.WriteLine("Number of Guesses: {0}\n", Guesses);
                            Console.WriteLine("You guessed correctly!");
                            cont = false;
                        }
                }
            }
            catch (FormatException)
            {
                errMsg = "Please enter a valid number...";
                WriteStats(Curr, Guesses, errMsg);
            }
        }
    }
}

Edited by ZekeDragon, 05 March 2010 - 07:58 AM.
Read cdg10620's first statement, remember to use [code] tags.