The type 'System.Windows.Input.ICommand' exists in both 'PresentationCore.dll' and 'System.dll'

Question

I\'ve got this error that I just can\'t figure out.

I\'m using VS 2012 (VS11) on Windows 8 with .net4.5 and I get this error when compiling a project that worked wit

Answer 1

I had a similar problem with fxcopcmd V12. I was able to solve it by explicitly adding

/reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\WindowsBase.dll"

See: FxCop engine exception on WPF assembly