public void ShowSignInWarning()
 {
     signInScreen            = new SignInMessageBoxScreen();
     signInScreen.Accepted  += signInAccepted;
     signInScreen.Cancelled += signInCancelled;
     ScreenManager.AddScreen(signInScreen);
 }
 private void confirmExitMessageBoxCancelled(object sender, EventArgs e)
 {
     if (isFromSigninCancel)
     {
         isFromSigninCancel      = false;
         signInScreen            = new SignInMessageBoxScreen();
         signInScreen.Accepted  += signInAccepted;
         signInScreen.Cancelled += signInCancelled;
         ScreenManager.AddScreen(signInScreen);
     }
 }