Create new revit Add-in faced with A fatal error!

[nia98bim]

Hey I tried to build my first plugin but when i add Revit.exe to my start action program and start debugging , I faced with the error below .

I put my files in attachments.

also really appreciated for your help in advance

[scgq425 · Accepted solution]

@nia98bim ：

have to set target  solution plaform version is 'x64' and 'Debug in Process'