public static void SetFileCreationTime( string filePath, DateTime date) { if (MustBeLongPath(filePath)) { filePath = CheckAddLongPathPrefix(filePath); using (var handle = CreateFileHandle( filePath, CreationDisposition.OpenExisting, FileAccess.GenericWrite, FileShare.Read | FileShare.Write)) { var d = date.ToFileTime(); if (!PInvokeHelper.SetFileTime1(handle.DangerousGetHandle(), ref d, IntPtr.Zero, IntPtr.Zero)) { var lastWin32Error = Marshal.GetLastWin32Error(); throw new Win32Exception( lastWin32Error, string.Format( Resources.ErrorSettingCreationTime, lastWin32Error, filePath, CheckAddDotEnd(new Win32Exception(lastWin32Error).Message))); } } } else { // 2012-08-29, Uwe Keim: Since we currently get Access Denied 5, // do use the .NET functions (which seem to not have these issues) // if possible. // Sergey Filippov: Item number 16314 from Codeplex issues fix if (File.Exists(filePath)) { File.SetCreationTime(filePath, date); } else if (Directory.Exists(filePath)) { Directory.SetCreationTime(filePath, date); } else { throw new FileNotFoundException(Resources.FileNotFound, filePath); } } }