public void UpdateMessageBox(SignalMessage updatedMessage)
{
if (OutgoingCache.ContainsKey(updatedMessage.Id))
{
var m = OutgoingCache[updatedMessage.Id];
var item = (ListViewItem)ConversationItemsControl.ContainerFromIndex(Collection.GetVirtualIndex(m.Index));
if (item != null)
{
var message = FindElementByName <Message>(item, "ListBoxItemContent");
bool retain = message.HandleUpdate(updatedMessage);
if (!retain)
{
OutgoingCache.Remove(m.Index);
}
}
}
}
