Problems opening forms in designer when dataset is defined in another assembly

[Magnus Bergh]

I got a weird problem with designer. I have created a spearate assembly
(DLL) containing my dataset classes and other classes which are shared
bewteen the projects in the solution.

When I try to open any form that use the dataset class or any of other
classes in the referenced assembly I get varoius errors in designer.

Looks like every time I open VS I need to do a) Rebuild solution, b)
Clean Solution and then I can open the forms. Sometimes I need to mess
around with Rebuild/Build clear etc to finally make it possibe to open
the forms.

Everything might look fine and forms open as they should. Then I close
the project and repopen and same problem again.

Any ideas why I have these problems? I don't have any problems when
dataset and other classes is in the same project.

I can compile and deploy the solution with no problems and it runs fine.

Some examples of errors I get in designer:
"Unable to cast object of type
'Microsoft.CompactFramework.Design.UnsafeComponent ' to type
'System.Data.DataSet'. "

"The variable 'FutDataSet' is either undeclared or was never assigned."

[Magnus Bergh]

This is getting really annoying. Tried to recreate projects and solution
but didn't help.

Is there anythign special you need to do to have your dataset in a
separate assembly?

[Magnus Bergh]

For those who like me has got the same problem (I have searched lot of
articles but not find any explanation), I found a solution:

In my assembly which contains the dataset class I also put some other
classes (including some form classes. The braindead designer did not
like this (even if code run fine at runtime). After moving the dataset
class out to a seperate dataset it now works fine.