Commented Unassigned: package restore: nothing to restore message [3491]

With all packages already restored, build a project.

Actual:
NuGet package restore started.
NuGet package restore finished.

Expected:
NuGet package restore started.
All packages are already installed and there is nothing to restore
NuGet package restore finished.

Comments: Nuget.exe shows this message "All packages listed in packages.config are already installed."