A family of Microsoft suites of integrated development tools for building applications for Windows, the web, mobile devices and many other platforms. Miscellaneous topics that do not fit into specific categories.
For me, I had opened another solution yesterday. This had added a NuGet package that VS was trying to load from my first solution. I could see and remove this package by right clicking the Solution in Solution Explorer, Manage NuGet Packages For Solution. Then clicking the cog/settings icon in the top right corner. In NuGet Package Manager, Package Sources I could uncheck the unwanted package and click OK. Now I could clean and rebuild my solution again. Prior to that I had also deleted bin folders in the projects that was stalling the cleaning, in an attempt to clean manually. Not sure if this had any effect.