Access to the path 'Autofac.Extensions.DependencyInjection.dll' is denied

[eduin....@ceiba.com.co]

I try to install the Autofac.Extensions.DependencyInjection nuggets package and it generates the Access error to the path 'Autofac.Extensions.DependencyInjection.dll' is denied.
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[Travis Illig]

This sounds a lot like one of two things:

1. You're using a version control system like TFS or Perforce where you have accidentally checked in Autofac.Extensions.DependencyInjection.dll and you haven't explicitly selected to check it out for changes before installing an update. TFS, for example, defaults to locking all files to be read-only unless you explicitly check the file out or switch your "workspace" to be local.
2. You've run VS as an administrator at one point so files or paths have been created as an administrator but you're now running VS as a standard user so you don't actually have rights to do the NuGet restore.

In either case, there's really nothing we can do from an Autofac perspective. You may be seeing the issue whilst installing the package, but the problem is with NuGet, Visual Studio, and your local machine.

Sorry I can't be of more help.