public WinDirectoryDialog(string title)
{
_openFileName = new OpenFileName();
_openFileName.structSize = Marshal.SizeOf(_openFileName);
_openFileName.file = new string(new char[256]);
_openFileName.maxFile = _openFileName.file.Length;
_openFileName.title = title;
}
public static extern bool GetSaveFileName([In, Out] OpenFileName ofn);