c# - How to write .csv from request stream -

i trying upload .csv files website server .

the files copied server fine , same size uploaded .csv files.

the problem when open .csv files on server content of file empty.

here uploader method:

public bool uploadcsvfile(stream uploadfilestream, string fileextension)         {             byte[] filedata = new byte[(int)uploadfilestream.length];             string hashname = bitconverter.tostring(md5cryptoserviceprovider.create().computehash(filedata)).replace("-", string.empty);             datetime = datetime.now;             string originalimagename = hashname + now.year + now.day + now.month + now.hour + now.minute + now.second + now.millisecond + fileextension;             var dropfolder = configurationmanager.appsettings["mydrop"];              var filenamepath = path.combine(dropfolder, originalimagename);              try              {               try                {                    var filestream = file.create(filenamepath);                    filestream.write(filedata, 0, filedata.length);                   filestream.close();              //i tried this:                   //var filestream = file.create(filenamepath, (int)uploadfilestream.length);                  // filestream.read(filedata, 0, filedata.length);                   //filestream.write(filedata, 0, filedata.length);                  // filestream.close();                   }                 catch (exception exc)                 {                     throw exc;                 }               }                 catch (exception ex)                 {                     throw ex;                 }              return true;         } 

you should able done as:

var filestream = file.create(filenamepath);  uploadfilestream.copyto(filestream);