Could you please look over this [AnswerHub post][1] entirely and let me know if the information provided here corrects the mscorlib issue you’re running in to?
I am running into a similar issue, I went as far as doing the steps vnhllsng did, new project and migrating but I am still getting the results package failed almost immediately, can you take a look at my log and help guide me please?[link text][1]
I am packaging to windows 32 bit and 64 bit I tried to package a blank project and it worked fine, I am attaching that log also don’t know if that helps, also they are both started from Blank projects.[link text][1]
This is the issue that’s seen within your : Visual C++ 2015 toolchain does not appear to be correctly installed. Please verify that “Common Tools for Visual C++ 2015” was selected when installing Visual Studio 2015.
Please [review this link][1] for additional assistance, thanks!