c# - XCopy commands to archive files with original date stamp -

i trying write .net console app use xcopy copy on files newer x days, while maintaining original date created timestamp. have command:

     /// <summary>     /// performs copy , verification using xcopy     /// </summary>     /// <returns>true if success, false otherwise</returns>     internal bool copyandverify()     {         string date = @"d:" + time.tostring("mm/dd/yyyy");         date = date.replace('/', '-');         date = date.insert(0, "/");         process exeprocess = new process();         processstartinfo startinfo = new processstartinfo();         startinfo.createnowindow = false;         startinfo.useshellexecute = false;         startinfo.redirectstandarderror = true;         startinfo.redirectstandardinput = true;         startinfo.redirectstandardoutput = true;         startinfo.filename = "xcopy.exe";         startinfo.windowstyle = processwindowstyle.hidden;         startinfo.arguments = "\"" + source + "\"" + " " + "\"" + dest + "\"" + @" /v " + date + " /i /s /r /h /y /z";         try         {             using (exeprocess = process.start(startinfo))             {                 exeprocess.waitforexit();             }         }         catch (exception)         {             return false;         }         return true;     } 

the code performs copy , verification, when test find folders/subfolders date modified , date created time of copy. doing wrong?

here's simple code run after xcopy set subdir destination folder dates , times same source. hope helpful.

      using system;     using system.collections.generic;     using system.linq;     using system.text;     using system.io;      namespace copy     {         class copydirtimestamps         {             public static bool copytimestamps(                 string sourcedirname, string destdirname, bool copysubdirs)             {                 try                 {                     copyfordir(sourcedirname, destdirname, copysubdirs, false);                     return true;                 }                 catch (exception)                 {                     return false;                 }             }               private static void copyfordir(                 string sourcedirname, string destdirname, bool copysubdirs, bool issubdir)             {                 directoryinfo dir = new directoryinfo(sourcedirname);                 directoryinfo[] dirs = dir.getdirectories();                  // if source directory not exist, throw exception.                 if (!dir.exists)                 {                     throw new directorynotfoundexception(                         "source directory not exist or not found: "                         + sourcedirname);                 }                  if (!directory.exists(destdirname)) return;                  directoryinfo destdir = new directoryinfo(destdirname);                  // if copysubdirs true, copy subdirectories.                 if (copysubdirs)                 {                     foreach (directoryinfo subdir in dirs)                     {                         // create subdirectory.                         string temppath = path.combine(destdirname, subdir.name);                          // copy subdirectories.                         copyfordir(subdir.fullname, temppath, copysubdirs, true);                     }                 }                  if (issubdir)                 {                     destdir.creationtime = dir.creationtime;                     destdir.lastaccesstime = dir.lastaccesstime;                     destdir.lastwritetime = dir.lastwritetime;                 }             }         }     }