Cannot resolve type errors when trying to build and run component samples

Trying to build and run a component sample from one of the DlhSoft products, such as Hierarchical Data Library, Gantt Chart Library, or Project Management Library, an error is generated, similar to this:

Unable to resolve type 'DlhSoft.Namespace.Type, DlhSoft.Assembly'

What is the problem?

You may have installed the product in a different folder than the standard one (C:\Program Files\DlhSoft product folder). In this case you just need to remove the existing references from the sample project (which point to invalid hint locations) and re-add them from the product installation folder as indicated in the documentation.