Deisgn-time error – DataSource property on BindingSource

Today I have beed cursing VS2005 for it’s stupidity and lack of error descriptions, it showed me a very informative message box:

An unexpected error has occured.
Object reference not set to an instance of an object.

… they could added a nice icon of „the finger”.

I tryed to change a DataSource property n BindingSource at design time. Aparently VS needs at least one class to be placed in the root of the project.

Anyway thanks to Kjell-Sverre for the tip.

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