Type does not contain a definition for identifier error

[Nilam2477]

I have a solution containing about 5 projects. One of these is "CommonClas s" witch contains a class User with a public property ReportName. In my web site i check this property on an user object (if (usr.ReportName ) ...) Intellisens works on the property, and when i right click and "go to definition" i go to the correct file and definiton. However when i build i get the following error:

'Project.Common Class.User' does not contain a definition for 'ReportName'

How can i fix this error?
Thanks

[Frinavale]

Is your Common Class and all other classes in the same namespace?