public static IAsyncResult SetTextBlockWithKey(TextBlock control, string key, string defaultText)
{
if (control == null || key == null)
{
throw new ArgumentNullException();
}
textControls[control.GetHashCode()] = key;
return GetTextAsync(key, defaultText, (s) =>
{
lock (textControls)
{
if (textControls[control.GetHashCode()] == key)
{
control.Text = s;
}
}
});
}