Asynchronous code in SilverLight with SharePoint - silverlight

Question

I have some problem with my code. I have silverlight button after I press button I want to load document library and get information about how many items are in this library co my code is:
var web = context.Web;
List sharedDocumentsList = context.Web.Lists.GetByTitle("dokumenty");
int i = sharedDocumentsList.ItemCount;
context.Load(sharedDocumentsList);
context.ExecuteQueryAsync(OnFileWriteSucceeded, OnFileWriteFailed);
But I got still same problem.
The collection has not been initialized. It has not been requested or the request has not been executed. It may need to be explixitly requested
How Can I get ItemCount. This is only a simple example I need to work with this list in cycle and so on. But I need to solve this main problem. How to work with this documentlist directly in button click method.
Thank You.

Answer 1

This works for me:
private List docList;
private void GetList()
{
var context = new ClientContext(ApplicationContext.Current.Url);
context.Load(context.Web);
docList = context.Web.Lists.GetByTitle("dokumenty");
context.Load(docList);
context.ExecuteQueryAsync(GetListSucceded, GetListFailed);
}
private void GetListFailed(object sender, ClientRequestFailedEventArgs e)
{
Dispatcher.BeginInvoke(() => MyErrorFunction();
}
private void GetListSucceded(object sender, ClientRequestSucceededEventArgs e)
{
Dispatcher.BeginInvoke(() => GetItemsCount());
}
private void GetItemsCount()
{
MessageBox.Show(docList.ItemCount.ToString());
}