Hi all,
I need some help I don't understand and don't know what else to try. I wrote a custom class and am updating the class and getting the following error

Things I've tried
Clean and Rebuild project
Restarted IIS and IIS express
Refreshed refereces
Refreshed Models
Build Model
Everything is successful but still getting the above
I have even manually confirmed the file in question does exist int he folder specified, with the specified file name
Please advise