问题
I have a program (console application) that makes use of LinqToTwitter to read some tweets. When I debug the program I get an error "The underlying connection was closed: An unexpected error occurred in a submission".
Message = An error occurred while sending the request. Message = The underlying connection was closed: An unexpected send error occurred.
If I build the program, I can run the program without any problems. I already researched and can't find the problem. Does it have to do with TLS 1.2? How do I set up in Visual Studio? I use VS 2015.
回答1:
Now that you mention TLS 1.2 and you're using an older version of Visual Studio, it makes sense. Add this to your Main procedure:
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12
Twitter switched to TLS 1.2 a while ago.
来源：https://stackoverflow.com/questions/60959588/visual-studio-2015-debug-with-http-connection-problems