Unit testing System.UnauthorizedAccessException: [InvalidCrossThreadAccess]

Posted on: 2011-12-22

When unit testing you can get this kind of error if you try to use a class that use different thread of the main one.

At first, I haven't realized that I were using another thread because I was testing my Shape class. After some minutes, I realized that I were using the System.Windows.Shape and not mine... once the reference set correctly I were able to remove this error and have my test working.

Test method UT.ShapeTest.CreateNewShape threw exception: System.UnauthorizedAccessException: [InvalidCrossThreadAccess] Arguments: ...