New undisposed instance of httpclient per request

[shmatt]

Hi,

I seem to be having trouble on multiple projects with failing to get a connection after my app has been running for a while.

I haven't got to the root cause yet, but I'm wondering if it is because the BaseProxy creates a new HttpClient for each request, and does not dispose of it. From what I understand, HttpClient should either be used as a singleton, or disposed of after each use (https://stackoverflow.com/questions/15705092/do-httpclient-and-httpclienthandler-have-to-be-disposed). I've also read elsewhere that this becomes a particular problem if keep-alive is used (which is used by default)