Open the project.
From Solution Explorer, right-click the project and select Properties. The project's properties appear.
Click References.
Click Add. The Add Reference screen appears.
Click the Browse tab. Browse to the SDK\DLLReferences folder.
Select these DLLs:
Blackbaud.AppFx
Blackbaud.AppFx.WebAPI
Blackbaud.Appfx.XmlTypes
Click OK.
Save the project.