mscorlib version conflict during build

Question

On a new Win8.1 reinstall, with all of my code restored from backup, I\'m suddenly now getting a Visual Studio warning when I build the main project of my solution:

Answer 1

Having different versions of a Nuget package on different projects may cause this problem as well. Make sure that all your packages have the same version:

1. (Within Visual Studio) Right click on the solution
2. Click on Manage Nuget packages for Solution
3. Click on the Consolidate tab
4. For every package in the Consolidate tab, update the package to the same version for every project.