I am trying to get my feet wet with the AFSDK and cannot get the Heat Exchanger example to compile. The error line occurs in frmHeatExchanger.cs on line 490. I've made no changes to the code. I've included references to the OSISoft.AFSDK and OSISoft.AF.UI assemblies. All the other references to AF objects are compiling. I'm building a Windows Forms application, targeting x86 and using the .Net 4.0 framework using Visual Studio 2010 Has anybody seen this?