.netcore grpc The SSL connection could not be established,

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 // 1、建立连接
var httpClientHandler = new HttpClientHandler();
// Return `true` to allow certificates that are untrusted/invalid
httpClientHandler.ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator;
var httpClient = new HttpClient(httpClientHandler);


using var channel2 = GrpcChannel.ForAddress("https://localhost:8711", new GrpcChannelOptions { HttpClient = httpClient });
var client2 = new Address.AddressClient(channel2);
var reply2 = await client2.TestMethodAsync(
new AddressRequest { Address = "GreeterClient" });

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