This guide describes the stepwise instructions to compare PDF files using C#, provides information to configure the document comparison library and sample code snippet to show the implementation of C# compare PDF files capability. These instructions can be used without installing any third-party software and on operating systems like MS Windows, Linux, and Mac OS that support the .NET environment.

Steps to Compare PDF Files using C#

1. Install GroupDocs.Comparison for .NET package from the NuGet website in the .NET project for comparing PDF files
2. Add a reference to the GroupDocs.Comparison namespace to compare two PDF documents
3. Instantiate Comparer class and pass the input PDF file to its constructor
4. Use Add method of the Comparer class for loading the target PDF document
5. Finally, invoke the Compare method to save the resultant PDF file to the disk

The compare two PDF files using C# functionality can be easily developed by following the above points in a sequence. In the first step, set up the required document comparison package and then reference the essential namespace. In the next step, load the source PDF file for comparison by creating an instance of the Comparer class and load the target PDF document by calling the Add method of the same class. In the last step, the resultant file can be saved to the disk by invoking the Compare method.

Code to Compare PDF Files using C#

In the preceding code snippet, we have demonstrated the compare two PDF documents and highlight differences C# capability. We have only consumed a couple of API calls of the document comparison library for creating the PDF comparing application. This sample code takes two PDF files for comparison, however, you may enhance the code for comparing multiple PDF documents.

We have discussed the detailed procedures to develop the PDF compare C# capability. Recently, we published an article on comparing Word files in C#, have a look at how to Compare Word documents using C# guide for more information.