服务器前提条件：
1、IIS7.5及以上
2、.net framework 4.5及以上
3、应用程序的托管管道模式必须为集成模式
4、需要开启websocket协议
请在 Web.config 中设置以下配置开关:
<system.web>
<httpRuntime targetFramework="4.5" />
</system.web>
关于.NET WebSocket connection to 'ws://xxx' failed: Error during WebSocket handshake: Unexpected response code: 200
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