This short tutorial describes the complete procedure to compare Excel files using C# and provides sample code to show the implementation of C# compare Excel files functionality. This functionality can be completed with a couple of lines of code and without installing any additional third-party tool. Further, these instructions can be consumed on any platform like MS Windows, Linux, and Mac OS that support the .NET environment.

Steps to Compare Excel Files using C#

1. Install GroupDocs.Comparison for .NET package from the NuGet in the .NET application for comparing Excel files
2. Add a reference to the GroupDocs.Comparison namespace to compare two Excel documents
3. Initialize Comparer class and load the source Excel file
4. Call the Add method of the Comparer class for loading the target Excel document
5. Finally, use the Compare method of the Comparer class for saving the resultant Excel file to the disk

To create the compare two Excel files for differences in C# functionality, you have to use the above points in a sequence. The document comparison can be started by installing the required package and then referencing the essential namespace in the code. After that, you need to initialize the Comparer class for loading the source Excel file and use the Add method for loading the target Excel document for comparison. In the end, invoke the Compare method to save the resultant file to the disk.

Code to Compare Excel Files using C#

We have developed the Excel comparison tool using C# in the above code snippet to show the implementation of this feature. You can see that it only requires consuming a few API calls for comparing the two XLSX files. However, you may modify this sample code by repeating step 4 for comparing the multiple Excel documents.

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