/// <summary> /// Returns a known folder given its shell namespace parsing name, such as /// <c>::{645FF040-5081-101B-9F08-00AA002F954E}</c> for the Recycle Bin. /// </summary> /// <param name="parsingName">The parsing name (or path) for the requested known folder.</param> /// <returns>A known folder representing the specified name.</returns> /// <exception cref="System.ArgumentException">Thrown if the given parsing name is invalid.</exception> public static IKnownFolder FromParsingName(string parsingName) { if (parsingName == null) { throw new ArgumentNullException("parsingName"); } IntPtr pidl = IntPtr.Zero; IntPtr pidl2 = IntPtr.Zero; try { pidl = Shell32.PidlFromParsingName(parsingName); if (pidl == IntPtr.Zero) { throw new ArgumentException("Parsing Name", "parsingName"); } // It's probably a special folder, try to get it IKnownFolderNative knownFolderNative = KnownFolderHelper.FromPIDL(pidl); if (knownFolderNative != null) { IKnownFolder kf = KnownFolderHelper.GetKnownFolder(knownFolderNative); if (kf == null) { throw new ArgumentException("Parsing Name", "parsingName"); } return(kf); } // No physical storage was found for this known folder // We'll try again with a different name // try one more time with a trailing \0 pidl2 = Shell32.PidlFromParsingName(parsingName.PadRight(1, '\0')); if (pidl2 == IntPtr.Zero) { throw new ArgumentException("Parsing Name", "parsingName"); } IKnownFolder kf2 = KnownFolderHelper.GetKnownFolder(KnownFolderHelper.FromPIDL(pidl)); if (kf2 == null) { throw new ArgumentException("Parsing Name", "parsingName"); } return(kf2); } finally { Shell32.ILFree(pidl); Shell32.ILFree(pidl2); } }