My VS2019 web service app solution cannot connect a client app to the .asmx web service within the same solution, if I close and re-open Visual Studio. I need help figuring out why the connection is being "forcibly rejected". This xml web service (.asmx) has been in production for years. The code is in a VS2019 solution on my desktop that also contains a desktop application that consumes the web service for testing. I added another .asmx page, added a web reference to, tested, everything is fine. The in-solution web reference url is "http://localhost:3455/Mobility20.asmx". But then I saved everything, closed Visual Studio, and opened it again. Now my test app fails to connect to either local web reference with:
System.Net.WebException
HResult=0x80131509
Message=Unable to connect to the remote server
SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:3455
But I can still connect to and use the production-deployed instance of the web service.
I've tried:
- Backing my code out to the last git commit and starting over. Same thing.
- Setting TLS settings to 'best practice' with CryptoIIS.
- http and https (each time making sure everything in the solution matches)
- Checking the firewall that it is not blocking my port 3455
- Turning off 'edit and continue' (that I read somewhere)
Any suggestions for how to troubleshoot this?