• Do not throw exception when calling DirectoryInfoWrapper.Parent for the root directory (#430) by @wexman
• Fix MockDirectoryInfo GetFiles for UNC paths caused by bug in StringExtensions.NormalizeSlashes (#422) by @DeveloperGuo
• Pass IFileSystem into FileWrapper instead of FileSystem to allow replacement file systems to be used (#432) by @kirbatious
• Make sure FileNotFound exceptions contain path and proper message (#427) by @fgreinacher
• Do not delete directories that start with the same path (#433) by @updateaman