Thursday, January 3, 2013

Visual Studio Could not load file or assembly bug


Could not load file or assembly ... or one of its dependencies.


Opening a form in Design Mode in Visual Studio 2010


The Copy Local property of a referenced DLL appears to be true, but actually it is not set to True in the XML project file.

Looking inside the XML file:

<Reference Include="...">

We should see a code like this one, but the yellow line "<Private>True</Private>", that is the one corresponding to the Copy Local property value, is missing.


The line could be manually inserted, but better proceed this way:
  1. Right click on the DLL that is giving the problem.
  2. Set the Copy Local property to False.
  3. Save the projetct
  4. Set the Copy Local property back to True.
  5. Save the project again.
This will cause Visual Studio to add the missing line "<Private>True</Private>".

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