Can not find System.Windows Assembly

Question

This is the error we get:

Error 1 The type \'System.Windows.Point\' is defined in an assembly that is not referenced. You must add a reference to as

Answer 1

If you don't have System.Windows in your .NET references, try WindowsBase. That fixed my reference to System.Windows.Point in VS 2008.

Answer 2

I've found the needed WindowsBase.dll in

C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0

Answer 3

If you are using .NET Framework 2.0, referencing

System.Windows.Forms

(and using the namespace with the identical name) will do the job too

Answer 4

Right click on your "References" folder and click "Add Reference" and then select System.Windows under the .NET tab.

Answer 5

Add the same references in your test project as you see as references in the project you are testing.

I got something like this and added:

PresentationCore PresentationFramework WindowsBase

Now it seems to stay quiet.

Answer 6

I had the same problem, however it was caused because we are using a Portable Class library and only occurred on certain PC installations.

I found the issue to be fixed on these installation with:

http://www.microsoft.com/en-us/download/details.aspx?id=3556

As this fix is included with VS2010 and Windows Update it would only occur on certain PCs.