Is there an OpenFileOrFolderDialog object in .NET?

This is the solution I have been looking for, this article provides code and describes how to create a dialog that meets my needs.

CodeProject: Full Implementation of IShellBrowser

Yes, you can use OpenFileDialog to select a folder. Here is an article in CodeProject that demonstrated a way to do it (http://www.codeproject.com/KB/dialog/OpenFileOrFolderDialog.aspx).