Is it possible to use non-special folder as a FolderBrowserDialog's root folder?

Question

FolderBrowserDialog.RootFolder Property is restricted to only special folder defined in the Environment.SpecialFolder enumerator. However in my applciation, we need to show

Answer 1

I wrote this solution based on this solution by ParkerJay86. The solution worked on Windows 8 with several paths tested. Consider that your specified rootFolder should start with DriveLetter:\ like "C:\ProgramData"

    private void browseFolder_Click(object sender, EventArgs e)
    {
        String selectedPath;
        if (ShowFBD(@"C:\", "Please Select a folder", out selectedPath))
        {
            MessageBox.Show(selectedPath);
        }
    }

public bool ShowFBD(String rootFolder, String title, out String selectedPath)
{
    var shellType = Type.GetTypeFromProgID("Shell.Application");
    var shell = Activator.CreateInstance(shellType);
    var result = shellType.InvokeMember("BrowseForFolder", BindingFlags.InvokeMethod, null, shell, new object[] { 0, title, 0, rootFolder });
    if (result == null)
    {
        selectedPath = "";
        return false;
    }
    else
    {
        StringBuilder sb = new StringBuilder();
        while (result != null)
        {
            var folderName = result.GetType().InvokeMember("Title", BindingFlags.GetProperty, null, result, null).ToString();
            sb.Insert(0, String.Format(@"{0}\", folderName));
            result = result.GetType().InvokeMember("ParentFolder", BindingFlags.GetProperty, null, result, null);
        }
        selectedPath = sb.ToString();

        selectedPath = Regex.Replace(selectedPath, @"Desktop\\Computer\\.*\(\w:\)\\", rootFolder.Substring(0, 3));
        return true;
    }
}