Rebuild failed: trailer not found.; Original message: PDF startxref not found.

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C#

ASP.NET

PDF

Hi All,

In My Web Application get the PDF from text on Page_Load but i got the error my Error Like this
Rebuild failed: trailer not found.; Original message: PDF startxref not found.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Rebuild failed: trailer not found.; Original message: PDF startxref not found.

Source Error:

string pdfTemplate = olddoc;
PdfReader pdfReader = new PdfReader(pdfTemplate);
PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileStream(
pdfTemplate, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite));

how to solve my error..
please help me

thanks and regards
Santhosh