You can face memory restrictions and issues while processing large PDF files using MemoryStream Class in C#. Any solution that restricts the input file size doesn’t work in cases where PDF file size is much bigger than 2.5GB. Below step-by-step guide will teach you how to process large PDF files in C# using advanced streams.

Steps to Process Large PDF Files in C#

1. Open Visual Studio and Create an empty C# Console Application
2. Install Latest version of Aspose.PDF for .NET from NuGet.org
3. Initialize OptimizedMemoryStream object to process large PDF file
4. Load large size PDF using FileStream
5. Write FileStream bytes into OptimizedMemoryStream
6. Initialize Document object using the InputStream-based constructor
7. Manipulate or modify PDF document as per your needs
8. Save the modified and processed document to the disk

When you are working with large sized PDF documents and have restrictions of local disk size, you need an interface that can allow seek-ability to be used to load huge PDF documents. Simple C# MemoryStream Class offers restrictions and causes high memory issues while processing huge PDF files due to lack of seek-ability. The solution of using advanced streams comes into the picture at this stage. The following code snippet shows how you can use advanced streams to load huge PDF files in C#.

Code to Process Large PDF Files in C#

The above simple code snippet enables you to process arbitrarily sized PDF documents without having the need of storing them on a local disk. The OptimizedMemoryStream Class in Aspose.PDF for .NET makes it possible to load huge PDF documents using memory stream in C#. It defines a MemoryStream that has a capacity more than standard and allows you to process huge PDF files with a size larger than 2.5GB.

You can also check another guide on how to read PDF bookmarks using C# in case your PDF document has bookmarks and you want to read them in your .NET Application.