Visual Studio Community 2015 Update 1 Build Issue

Question

Following a change from Visual Studio 2015 Enterprise to Visual Studio 2015 Community (with Update 1), none of my projects build.

The errors I see in the error list are as follows -

1. The "Csc" task could not be initialized with its input parameters.

2. The "Features" parameter is not supported by the "Csc" task. Verify the parameter exists on the task, and it is a settable public instance property.

Having Googled extensively, I can't seem to find anything helpful.

Answer 1

Somehow you have mismatched your C#/VB compilers. Your project files are trying to pass a property we added to a newer version of the compilers, but you're still running an older version of the compilers. It's unclear based on your description if that's all projects that are broken, or just some. Things I would check:

1. If just some projects don't build, make sure you don't have our compiler NuGet packages installed but you didn't run restore.
2. If you had some experimental version of the Roslyn compilers installed that you forgot about, make sure that's still installed.
3. If all projects don't build (including you just building a brand new one) verify there's nothing strange installed under the Extension Manager. If there is nothing, then do a repair install of Visual Studio.