All my projects in my solution are set to build with .net framework 4.5.
I'm trying to create a C# VSTO project however cannot assign the .net 4.5 target framework. This is required so I can reference other projects in my VSTO project.
The error states that the project cannot be used against the targeted framework (.net 4.5).
Alternatively, do I have to implement the excel add-in without using a VSTO project?