System.IO.IOException: There is not enough space on the disk.

   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.WriteCore(Byte[] buffer, Int32 offset, Int32 count)
   at System.IO.FileStream.FlushWrite(Boolean calledFromFinalizer)
   at System.IO.FileStream.Flush(Boolean flushToDisk)
   at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
   at InsuranceCommon.Utilities.SaveStringRequestResponse(String CompanyName, String Type, String data, String EnquiryNo) in C:\CODES\MailProject\InsuranceCommon\Utilities.cs:line 86
   at Insurance.Controller.ProposalController.<UploadfileondropboxnewAsync>d__6.MoveNext() in C:\CODES\MailProject\Insurance\Controller\ProposalController.cs:line 217