A project won't compile because of a missing assembly. The file that causes the error has a
using Microsoft.VisualStudio.DebuggerVisualizers;
The VisualStudio
part is marked in red. What do I have to install to fix it? To me it sounds like something that would have come with Visual Studio, but that is what I am using, so it is installed...
Clarification: I know what assembly it exists in, and the reference is added earlier to the project references. But how do I get it? What SDK do I have to install? Or have I forgotten to check something off when I installed Visual Studio?
You should be able to find it in the "Add Reference" dialog in the .Net tab.
If not, the Microsoft.VisualStudio.DebuggerVisualizers.dll
lives in the Common7\IDE\PublicAssemblies
subdirectory of Visual Studio's installation directory. You could add it manually from there.