System.OutOfMemoryException while Creating PDF files

Hi,

I am using C# with framework 2.0 and creating PDF files on-fly, along
with this I am using Windows 2003 Server.

I am using Byte[] to take the data input and then save into pdf format
on harddrive location.

Now after creating few successful pdf files, I am getting
"System.OutOfMemoryException".

Is this problem coming because of large data is been sent to Byte[] to
create PDF file or something else could be the cause.

If so, then how to resolve this issue??

Thanks in Advance,

Manoj