Microsoft.VisualStudio.Project.SolutionListenerForProjectReferenceUpdate.GetProjectReferencesContainingThisProject C# (CSharp) Method

        private List<ProjectReferenceNode> GetProjectReferencesContainingThisProject(IVsHierarchy inputHierarchy)
        {
            List<ProjectReferenceNode> projectReferences = new List<ProjectReferenceNode>();
            if(this.Solution == null || inputHierarchy == null)
            {
                return projectReferences;
            }

            uint flags = (uint)(__VSENUMPROJFLAGS.EPF_ALLPROJECTS | __VSENUMPROJFLAGS.EPF_LOADEDINSOLUTION);
            Guid enumOnlyThisType = Guid.Empty;
            IEnumHierarchies enumHierarchies = null;

            ErrorHandler.ThrowOnFailure(this.Solution.GetProjectEnum(flags, ref enumOnlyThisType, out enumHierarchies));
            Debug.Assert(enumHierarchies != null, "Could not get list of hierarchies in solution");

            IVsHierarchy[] hierarchies = new IVsHierarchy[1];
            uint fetched;
            int returnValue = VSConstants.S_OK;
            do
            {
                returnValue = enumHierarchies.Next(1, hierarchies, out fetched);
                Debug.Assert(fetched <= 1, "We asked one project to be fetched VSCore gave more than one. We cannot handle that");
                if(returnValue == VSConstants.S_OK && fetched == 1)
                {
                    IVsHierarchy hierarchy = hierarchies[0];
                    Debug.Assert(hierarchy != null, "Could not retrieve a hierarchy");
                    IReferenceContainerProvider provider = hierarchy as IReferenceContainerProvider;
                    if(provider != null)
                    {
                        IReferenceContainer referenceContainer = provider.GetReferenceContainer();

                        Debug.Assert(referenceContainer != null, "Could not found the References virtual node");
                        ProjectReferenceNode projectReferenceNode = GetProjectReferenceOnNodeForHierarchy(referenceContainer.EnumReferences(), inputHierarchy);
                        if(projectReferenceNode != null)
                        {
                            projectReferences.Add(projectReferenceNode);
                        }
                    }
                }
            } while(returnValue == VSConstants.S_OK && fetched == 1);

            return projectReferences;
        }