You may encounter “Unexpected character encountered while parsing value: <. Path '', line 0, position 0." when trying to parse Json result that are downloaded from the WebClient method if the data is compressed in GZip. This is because WebClient does not decompress the data downloaded.
Thankfully the GZipWebClient library from Morten Nielsen aim to solve this problem. And surprisingly it is very easy in using this library. Simply get the library from Nuget(provided in the link below). Thereafter replace WebClient with GZipWebClient. Yes, it is just that simple.
On a side note, this library does seem to improve the performance of my existing app given that a smaller payload mean data load faster especially on slower network.