Random assembly references fail (“Are you missing a using directive or an assembly reference?”)

Question

My application has a mixture of 3.5 and 4.0-targeted assemblies. I\'m working on a new Windows service targeting 4.0 and the project suddenly seems unable to see some of th

Answer 1

Check the target platform of the new project and make sure it's not targeting .NET 4 Client Profile. If it is, change it to regular .NET 4