c# - Read Image as base64 string; Out of memory exception -

i'm trying convert images in directory base64 strings. when test in local computer works, on server gives out of memory exception: here method:

 private imagedataviewmodel readimagesfromdisk(guid id)     {         list<string> imagelist = new list<string>();         imagedataviewmodel imagedataviewmodel = new imagedataviewmodel();         string path = httpcontext.current.server.mappath("~/businessimages/" + id.tostring());         try         {             if (directory.exists(path))             {                 var images = directory.getfiles(path, "*.*", searchoption.alldirectories)                     .tolist();                  string filename = id.tostring();                  foreach (var item in images)                 {                      using (image image = image.fromfile(item))                     {                         using (memorystream m = new memorystream())                         {                             image.save(m, image.rawformat);                             byte[] imagebytes = m.toarray();                             // convert byte[] base64 string                             string base64string = convert.tobase64string(imagebytes);                                                                                     imagelist.add(base64string);                                                                              }                     }                 }                 imagedataviewmodel.id = id;                 imagedataviewmodel.imagedata = imagelist;                  return imagedataviewmodel;             }             else             {                 return null;             }         }         catch (exception ex)         {              throw ex;         }                 } 

i don't know how happens. there way handle problem?

byte[] filebytes = system.io.file.readallbytes(yourfilepath + fname); string filename = yourfilename.split(new string[] { "/" }, stringsplitoptions.none)[1]; return file(filebytes, system.net.mime.mediatypenames.application.octet, filename); 

try this, return whole file.