public async void SelctedItemHandler(object sender, SelectedItemChangedEventArgs e)
        {
            if (e == null)
            {
                return;
            }

            Debug.WriteLine($"Selected Conversation {e.SelectedItem}");
            Controller.SelectConversation(e.SelectedItem as ChatConversation);
            await RootPage.NavigateToPage(ChatPage);
        }
 private async void NewContactFunctionAsync(object e)
 {
     await RootPage.NavigateToPage(new AddContactPage(Controller));
 }
 private async void NewConversationFunctionAsync()
 {
     Debug.WriteLine("NewConversationFunctionAsync");
     await RootPage.NavigateToPage(ChatNewConversationPage).ConfigureAwait(false);
 }