Specifies which projects to enumerate within a solution.
This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.
Assembly: Microsoft.VisualStudio.Shell.Interop (in Microsoft.VisualStudio.Shell.Interop.dll)
|All normal projects referenced in the solution file.|
|All projects including normal projects directly referenced in the solution file as well as all virtual projects including nested (a.k.a. sub) projects.|
|All 'virtual' projects of any kind.|
|Normal projects referenced in the solution file and currently loaded.|
|All normal projects referenced in the solution file projects with project type GUID matching parameter.|
|Normal projects referenced in the solution file and currently not loaded.|
|"Virtual" projects are not visible as top-level projects in Solution Explorer. NOTE: these are projects that are not directly referenced in the solution file and are usually displayed as nested (a.k.a. sub) projects in Solution Explorer.|
|"Virtual" projects are visible as top-level projects in Solution Explorer.|
When a virtual project is added, you can specify whether to place it in the Solution Explorer. If a virtual project is in the Solution Explorer, then it is visible ().
are not directly referenced in the solution file; instead they are projects that are created programmatically by way of a non-standard UI.