Installed the AFClient, which is supposed to include the SDK. I'm creating a new c# project where I want to access the SDK. How do I go about doing this?
It should be as simple as adding a reference to the OSIsoft.AFSDK 18.104.22.168 dll to your project. You should find this in your Extensions in your project in Visual Studio.
In addition to the answer given by Vince , you should target your application to .NET Framework 4.5.2. When AF 2018 (AF SDK 2.10) is released, it will require targeting of .NET 4.6.2 for new applications.
If you are setting up the environment for the first time, I recommend taking a quick look at AF SDK Development Environment & Versions
Retrieving data ...