public static void AddKill(this PhotonPlayer player, int num)
{
int current = player.GetKill();
current += num;
Hashtable props = new Hashtable();
props[KillProp] = current;
player.SetCustomProperties(props); // SetCustomProperties 会将多个 new Hashtable 转换为字符串键值对并封装在一起（player.CustomProperties）
}
public static void AddKill(this PhotonPlayer player, int killToAddToCurrent)
{
int current = player.GetKill();
current = current + killToAddToCurrent;
Hashtable hkill = new Hashtable(); // using PUN's implementation of Hashtable
hkill[PlayerKill.PlayerKillProp] = current;
player.SetCustomProperties(hkill); // this locally sets the score and will sync it in-game asap.
}
