Microsoft.VisualStudio.Project.ProjectNode.VerifySubFolderExists C# (CSharp) Method

        protected virtual FolderNode VerifySubFolderExists(string path, HierarchyNode parent)
        {
            FolderNode folderNode = null;
            uint uiItemId;
            Url url = new Url(this.BaseURI, path);
            string strFullPath = url.AbsoluteUrl;
            // Folders end in our storage with a backslash, so add one...
            this.ParseCanonicalName(strFullPath, out uiItemId);
            if (uiItemId != (uint)VSConstants.VSITEMID.Nil)
            {
                Debug.Assert(this.NodeFromItemId(uiItemId) is FolderNode, "Not a FolderNode");
                folderNode = (FolderNode)this.NodeFromItemId(uiItemId);
            }

            if (folderNode == null && path != null && parent != null)
            {
                // folder does not exist yet...
                // We could be in the process of loading so see if msbuild knows about it
                ProjectElement item = null;
                foreach (MSBuild.ProjectItem folder in buildProject.GetItems(ProjectFileConstants.Folder))
                {
                    if (String.Compare(folder.EvaluatedInclude.TrimEnd('\\'), path.TrimEnd('\\'), StringComparison.OrdinalIgnoreCase) == 0)
                    {
                        item = new ProjectElement(this, folder, false);
                        break;
                    }
                }
                // If MSBuild did not know about it, create a new one
                if (item == null)
                    item = this.AddFolderToMsBuild(path);
                folderNode = this.CreateFolderNode(path, item);
                parent.AddChild(folderNode);
            }

            return folderNode;
        }