Thread: OutOfRangeExceptionHandler error while debugging

Hello everyone i need some help regarding to my problem.

I'm making a weatherforecast apllication(REST method in C# language)
i write the code and it shows no error or warnings.
but when i run the debugger it show an error(See pics)
PS: im using Visual basic 2010 professional edition.

http://imageshack.us/photo/my-images/844/error1z.jpg/

This is the codes that i write.

using System.Xml.Linq;

using System.Net;









namespace RESTService

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();





            // Obtain the Foracast.

            GetForecast();





            // Display the Forecast data.

            DisplayData(ForecastNumber);

        }

        // Holds all of the weather data

        XDocument GetData;





        // Contains just the forecast.

        IEnumerable<XElement> Forecast;





        //Specifies which Forecast to use.

        Int32 ForecastNumber;





        // Defines the maximum number of farecast.

        Int32 MaxForecasts;





        // Contains a list of icons associated with the forecast.

        IEnumerable<XElement> Icons;





        // Specifies which icon to use.

        Int32 IconNumber;





public void GetForecast()

{

    // Contains the result of a retry request.

    DialogResult TryAgain = DialogResult.Yes;





    // Keep trying to get the weather data until the user

    // Gives up or the call is successful.

    while (TryAgain == DialogResult.Yes)

    {

        try

        {

            // Get the weather data.

            GetData =

                XDocument.Load(

                "http://api.wunderground.com/auto/wui/geo" 

                + "/ForecastXML/index.xml?query="

                + txtLocation.Text);





            // End the loop

            TryAgain = DialogResult.No;

        }

        catch (WebException)

        {

            TryAgain = MessageBox.Show(

                "Couldn't obtain the weather data! \r\n Try again?",

                "Data Download Error",

                MessageBoxButtons.YesNo,

                MessageBoxIcon.Error);

        }

    }





    // Obtain all the forecasts.

    Forecast =

        GetData.Element("forecast").Element("txt_forecast").Elements("forecastday");





    // Define the maximum number of forecasts.

    MaxForecasts = Forecast.Count() - 1;





    // Specify which forecast to use.

    ForecastNumber = 1;





    // Specify which icon to use.

    IconNumber = 1;





    // Reset the buttons.

    btnNext.Enabled = true;

    btnPrevious.Enabled = false;

}





public void DisplayData(Int32 FNumber)

{

    // Display the title of the current forecast.

    txtTitle.Text = Forecast.ElementAt(FNumber).Element("title").Value;





    // Display detailed forecast information.

    txtForecast.Text = Forecast.ElementAt(FNumber).Element("fctext").Value;





    // Obtain a list of icons associated with the forecast.

    Icons = Forecast.ElementAt(FNumber).Element("icons").Elements("icon_set");





    // Define the maximum numbers of available icons.

    IconSelect.Maximum = Icons.Count() - 1;





    // Display the icon on screen.

    wbIcon.Url = new Uri(Icons.ElementAt(IconNumber).Element("Icon_url").Value);

}

Can somebody correct what error i made? Because i try fixing it almost an hour but i can't see my error
i tried changing the value of "Fnumber" but the error is still there.
PS: I hope this is the right place to post this topic.

txtTitle.Text = Forecast.ElementAt(FNumber).Element("title").Value ;

According to exception there is not an element at index FNumber.

Thanks for the heads up. I change the FNumber to ForecastNumber and it works! thnx m8.