The designer could not be shown for this file because none of the classes within it can be designed

Question

We have the following shared component:

public class OurServiceBase : System.ServiceProcess.ServiceBase

This class has functionality we wan

Answer 1

Further to Ausibanez's answer above.

My app was in X64 but my problem was I had recently added a COM reference to WIA (Windows Image Acquisition) which was the issue.

But oddly...

1. It worked for some time before it decided to no longer work, and
2. WIA was not being called on the particular inherited form or its base.

But, once the reference to WIA was removed, all was OK again.

So, check your COM references!