I am getting this following error when trying to build. Looks like the Proj CS file is missing.
Severity Code Description Project File Line Suppression State
Error NU1105 Unable to find project information for 'F:\MySourceDB\nopcommerce\Presentation\Nop.Web.Framework\Nop.Web.Framework.csproj'. Inside Visual Studio, this may be because the project is unloaded or not part of current solution. Otherwise the project file may be invalid or missing targets required for restore. Nop.Web F:\MySourceDB\nopcommerce\Presentation\Nop.Web\Nop.Web.csproj 1