private void ShowCrowdChatWindow(string username)
        {
            var user       = new UserSession(username);
            var mainWindow = new CrowdChatWindow(user);

            mainWindow.Show();
        }
 private void ShowCrowdChatWindow(string username)
 {
     var user = new UserSession(username);
     var mainWindow = new CrowdChatWindow(user);
     mainWindow.Show();
 }