Is it possible to populate ComboBox AutoComplete suggestions box using call to remote server tha returns JSON

Hi,

I am trying populate AutoComplete box using a call to remote server that return JSON list with suggestions. I've tried to put some code into "TextChanged" event handler, but either box does not appear or disappears fast. I already have following:

AutoCompleteMode = Suggest;
AutoCompleteSource = CustomSource;

So then in my code I set AutoCompleteCustomSource = "my new source that contains the suggestion".

Following is a sample code based on what I've explained above:

private void myCombBox_TextChanged(object sender, EventArgs e)
{
    string requestUrl = string.Format(@"http://suggestqueries.google.com/complete/search?client=firefox&q={0:s}", System.Uri.EscapeDataString(cbRequests.Text));
    WebRequest request = WebRequest.Create(requestUrl);
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    string content = new StreamReader(response.GetResponseStream()).ReadToEnd();
    response.Close();
    JavaScriptSerializer serializer = new JavaScriptSerializer();
    dynamic result = serializer.Deserialize(content, typeof(object));
    this.BeginInvoke((Action)delegate()
    {
        myCombBox.AutoCompleteCustomSource.Clear();
        myCombBox.AutoCompleteCustomSource.AddRange((result[1] as object[]).Cast<string>().ToArray());
        myCombBox.SelectionLength = 0;
        myCombBox.SelectionStart = cbRequests.Text.Length;
    });
}

If I remove myComboBox update part out of BeginInvoke, then at some point I get Memory corruption error which is most likely dues to threading/locking issues.

Any suggestions?

Thanks