Made BaseUrl property virtual
Made BaseUrl property virtual

I have a settings object that is the one true source for `BaseUrl`. I'd rather avoid having to observe changes to that object in order to set the `BaseUrl` property on the `RestClient`. Instead, I have a derived `MyRestClient` that sets `BaseUrl` to the value of my settings object. If `BaseUrl` is virtual, I can do this. :)
paulcbetts/RestSharp,restsharp/RestSharp,amccarter/RestSharp,SaltyDH/RestSharp,fmmendo/RestSharp,dmgandini/RestSharp,uQr/RestSharp,eamonwoortman/RestSharp.Unity,chengxiaole/RestSharp,lydonchandra/RestSharp,benfo/RestSharp,IsCoolEntertainment/unity-restsharp,PKRoma/RestSharp,mattwalden/RestSharp,wparad/RestSharp,rucila/RestSharp,devinrader/RestSharpRTExperimental,Haacked/RestSharp,who/RestSharp,devinrader/RestSharpRTExperimental,haithemaraissia/RestSharp,IsCoolEntertainment/unity-restsharp,felipegtx/RestSharp,mwereda/RestSharp,huoxudong125/RestSharp,cnascimento/RestSharp,periface/RestSharp,rivy/RestSharp,kouweizhong/RestSharp,KraigM/RestSharp,dyh333/RestSharp,jiangzm/RestSharp,Haacked/RestSharp,mattleibow/RestSharp,paulcbetts/RestSharp,wparad/RestSharp,RestSharp-resurrected/RestSharp,dgreenbean/RestSharp