Error faced when trying to retieve data to listpicker using web service.

Question

Hi everyone, please do me a favour here. I'm new to c# for windows phone 7.

I'm using web service to retrieve data from linq to sql and display in my listpicker. Whenever i run the application, the error will point to "listPickerEstate.ItemsSource = e.Result;", which is in my xaml.cs .

The error message will be:
ArgumentOutOfRangeException was unhandled

Troubleshooting tips:

Make sure the arguments to this method have valid values.

If you are working with a collection, make sure the index is less than the size of the collection.

When using the overload two-argument FindString or FindExactString methods with a ComboBox or ListBox,check the startIndex parameter.

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Codes in xaml.cs




public Settings()
  {


// create AppSettings instance 
  appSettings = new AppSettings();
InitializeComponent();
 ServiceImplClient  varEstates = new ServiceImplClient();

  varEstates.GetEstatesNameCompleted +=new EventHandler<GetEstatesNameCompletedEventArgs>(varEstates_GetEstatesNameCompleted);
varEstates.GetEstatesNameAsync()
  }
void varEstates_GetEstatesNameCompleted(object sender, GetEstatesNameCompletedEventArgs e)Sorry for the mess. I seems to arrange the codes neatly. I'm stucked in this coding for very long. Please help me.
  {
  listPickerEstate.ItemsSource = e.Result;