private void Button_Click_2(object sender, RoutedEventArgs e)
        {
            try
            {
                if (Friends.Count == 0)
                {
                    Friends = VkApi.GetFriends(User.Uid);
                    FriendsButton.ContextMenu = new System.Windows.Controls.ContextMenu();

                    foreach (var friend in Friends)
                    {
                        var m = new System.Windows.Controls.MenuItem {
                            Header = friend.FirstName + " " + friend.LastName
                        };
                        var bc = new BrushConverter();
                        m.Background = (Brush)bc.ConvertFrom("#FF2D343A");
                        m.Foreground = (Brush)bc.ConvertFrom("#FFECFDFC");
                        m.Click     += m_ClickFriends;
                        FriendsButton.ContextMenu.Items.Add(m);
                    }
                }

                FriendsButton.ContextMenu.IsOpen = true;
            }
            catch (NetworkInformationException)
            {
                System.Windows.Forms.MessageBox.Show(@"Ошибка интернет соединения.");
            }
        }