How to Load Existing Spreadsheets in C#

Name: IronXL
Brand: Iron Software
Availability: InStock
Rating: 4.67 (175 reviews)

ByRegan Pun

May 31, 2025

Updated June 22, 2025

In this comprehensive tutorial, we explore how to load existing Excel spreadsheets and CSV files into a C# application using the IronXL library. To begin, ensure the IronXL NuGet package is installed in your project. This can be done easily via the NuGet package manager.

Start by importing the IronXL namespace into your program's C# file and setting your IronXL license key. IronXL supports a variety of Excel formats, including XLSX, XLS, XLSM, and XLTX.

By following these outlined steps, you can effectively manage existing spreadsheets and CSV files in your C# projects, leveraging the capabilities of IronXL.

We hope this tutorial is beneficial. Subscribe for more informative tutorials from Myer Software, and sign up for IronXL's trial to experience its capabilities firsthand.

Further Reading: How to Load Existing Spreadsheets

Regan Pun

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Software Engineer

Regan graduated from the University of Reading, with a BA in Electronic Engineering. Before joining Iron Software, his previous job roles had him laser-focused on single tasks; and what he most enjoys at Iron Software is the spectrum of work he gets to undertake, whether it’s adding value to sales, technical support, product development or marketing. He enjoys understanding the way developers are using the Iron Software library, and using that knowledge to continually improve documentation and develop the products.

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