public static void Remove(HotkeyHandler h)
 {
     lock (handlers)
     {
         if (handlers.Value.ContainsValue(h))
         {
             int id = handlers.Value.First(x => x.Value == h).Key;
             handlers.Value.Remove(id);
             User32.UnregisterHotKey(form.Value.Handle, id);
         }
     }
 }
 public static void Add(HotkeyHandler h)
 {
     lock (handlers)
     {
         if (!handlers.Value.ContainsValue(h))
         {
             int id = ++iids;
             handlers.Value.Add(id, h);
             User32.RegisterHotKey(form.Value.Handle, id, h.ModKey, h.Key);
         }
     }
 }