NetworkServer 使用 NetworkServerSimple 实现基本网络功能，并增加了更多类似游戏的功能。
NetworkServer 通过 NetworkServerSimple 实例处理来自远程客户端的远程连接，并且拥有针对本地客户端的本地连接。
NetworkServer 是一个单例。它提供静态的便捷函数，例如 NetworkServer.SendToAll() 和 NetworkServer.Spawn()，这些函数自动使用单例实例。
NetworkServer 可以与 NetworkManager 结合使用，但也可以独立使用。
生成的联网对象集由 NetworkServer 管理。NetworkServer.Spawn() 生成对象并将其添加到该集合中，并在客户端上创建这些对象。生成的对象被销毁时，系统会自动将其删除，或者，也可以通过调用 NetworkServer.UnSpawn() 从生成的对象集中将其删除，但这不会销毁这些对象。
NetworkServer 会使用许多内部消息，这些消息是在调用 NetworkServer.Listen() 时设置的。
| AddPlayerForConnection | 当 AddPlayer 消息处理程序收到玩家请求后，服务器会调用此请求，以将玩家对象与连接关联。 |
| BecomeHost | 这将允许已从服务器断开连接的客户端成为新版游戏的主机。 |
| ReplacePlayerForConnection | 此方法会将连接的玩家对象替换成其他玩家对象。不销毁旧玩家对象。 |
| SendBytesToReady | 此方法会向所有准备的玩家发送一个字节数组。 |
| SendToAll | 将带有指定类型编号的消息结构发送到所有连接的客户端。 |
| SendToClient | 将消息发送到拥有指定连接 ID 的客户端。 |
| SendToClientOfPlayer | 将消息发送到拥有指定玩家对象实例的客户端。 |
| SendToReady | 将带有指定类型编号的消息结构仅发送到已准备就绪的客户端。 |
| SendUnreliableToAll | 将指定消息结构作为不可靠消息发送到所有连接的客户端。 |
| SendUnreliableToReady | 将指定消息结构作为不可靠消息仅发送到已准备就绪的客户端。 |
| SendWriterToReady | 将 NetworkWriter 对象的内容发送至已准备就绪的玩家。 |
| Spawn | 在已准备就绪的所有客户端上生成指定的游戏对象。 |
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