game physics - (C#) Can't manage to make restrictions for moving Object -

beginner, don't blame :),i'm coding simple "pingpong" game in c#, practice bit because second week of learning language. i've tried make keyevents make "picsschlägerrechts" move , down, wich worked well, can't manage make "restriction" not move out of panel. ideas?

private static bool conditionup ;     private static bool conditiondown ;       private void frmpingpong_keydown(object sender, keyeventargs e)     {          {             if (!(picschlägerrechts.location.y == 0 && picschlägerrechts.location.y == 249)) {                 conditiondown = true;                 conditionup = true;             }              if (e.keycode == keys.w && conditionup == true)             {                 picschlägerrechts.location = new point(picschlägerrechts.location.x, picschlägerrechts.location.y - ms);                       if (picschlägerrechts.location.y == 0)                     {                         conditionup = false;                      }               }             if(e.keycode == keys.s && conditiondown == true)             {                 picschlägerrechts.location = new point(picschlägerrechts.location.x, picschlägerrechts.location.y + ms);                  if (picschlägerrechts.location.y == 298)                 {                     conditiondown = false;                   }             } 

you try checks make sure y not go greater or less max/min y

private void frmpingpong_keydown(object sender, keyeventargs e) {     var maxy = 298;     var miny = 0;      if (e.keycode == keys.w)     {         var newy = picschlägerrechts.location.y - ms;          if (newy < miny)         {             newy = miny;         }         picschlägerrechts.location = new point(picschlägerrechts.location.x, newy);     }     else if (e.keycode == keys.s)     {         var newy = picschlägerrechts.location.y + ms;          if (newy > maxy)         {             newy = maxy;         }         picschlägerrechts.location = new point(picschlägerrechts.location.x, newy);     } }