c# - XNA - Freezing Menu Error -


when click down arrow gets stuck on second selection , or down no longer work, how fix that?

second question: how prevent freezing when changing menu items? when change menu items, freezes of second selection. here code concerning question;

keyboard = keyboard.getstate(); mouse = mouse.getstate();      if (keyboard.iskeyup(keys.up) && prevkeyboard.iskeydown(keys.down))     {         if (selected > 0) selected--;         else selected.equals(buttonlist.count - 1);     }      if (keyboard.iskeyup(keys.up) && prevkeyboard.iskeydown(keys.down))     {         if (selected < buttonlist.count - 1) selected++;         else selected.equals(0);     }      prevmouse = mouse;     prevkeyboard = keyboard; }

the original code had, after being modified worked fine me. here modifications:

    public void update(gametime gametime)     {         keyboard = keyboard.getstate();         mouse = mouse.getstate();          if (checkkeyboard(keys.up))         {             if (selected > 0) selected--;             else{selected = buttonlist.count - 1;}         }          if (checkkeyboard(keys.down))         {             if (selected < buttonlist.count - 1) selected++;             else {selected = 0;}         }          prevmouse = mouse;         prevkeyboard = keyboard;     }      public bool checkmouse()     {         return (mouse.leftbutton == buttonstate.pressed && prevmouse.leftbutton == buttonstate.released);     }      public bool checkkeyboard(keys key)     {         //here thing needed changed, based on original post         //you checking if both keys down originally, meaning          // true while button pressed. if previous keyboard down,         //and current keyboard up, means button released.         return (keyboard.iskeyup(key) && prevkeyboard.iskeydown(key));     }

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