dotnet core 3.1 gRPC win7 NotSupportedException: HTTP/2 over TLS is not supported on Windows 7 due

啓動時報了2個錯：

       1、  AggregateException: One or more errors occurred. (HTTP/2 over TLS is not supported on Windows 7 due to missing ALPN support.) (HTTP/2 over TLS is not supported on Windows 7 due to missing ALPN support.)

       2、NotSupportedException: HTTP/2 over TLS is not supported on Windows 7 due to missing ALPN support.

我的解決辦法：

        打開 appsetting.json 文件 ，這部分          

"Kestrel": {
    "EndpointDefaults": {
      "Protocols": "Http2"
    }
  }

   客戶端可以全部刪除，或者刪除 “EndpointDefaults”節點內容。

  服務端可以修改，將“EndpointDefaults”改爲 “EndpointDefults”：例如

"Kestrel": {
    "Endpoints": {
      "Http": {
        "Url": "http://+:5000"
      },
      "Https": {
        "Url": "https://+:5001"
      },
      "Http2": {
        "Url": "http://+:5002",
        "Protocols": "Http2"
      }
    }

其中，5000和5001 都是服務端的啓動端口（ launchSetting.json文件中 Profiles:ApplictionUrl 內容）