Adding dll reference
问题 I've got a strange problem adding a dll reference. I've got a WPF application and am trying to use the WPF MDI library: http://wpfmdi.codeplex.com/ As stated in the instructions (which are very vague), I right-clicked on references in VS2012, clicked on Add reference.. , clicked on Browse.. and added my dll which I downloaded. Next, I added the following line in the XAML of my window: xmlns:mdi="clr-namespace:WPF.MDI;assembly=WPF.MDI" as stated in the instructions. However, when trying to add