Uri Concatenation Issue

[MelbourneDeveloper]

The base uri must have a / at the end. This is basically a bug with the Uri class. If you don't specify it, some parts of the uri may not be concatenated.

https://stackoverflow.com/questions/64617310/httpclient-modifies-baseaddress-in-some-cases/64617792?noredirect=1#comment114255884_64617792

This is done but more tests required. Also, don't add a backslash to end where there is no resource