How to Create an Excel File in C# using IronXL ByRegan Pun August 29, 2022 Updated June 22, 2025 Share: Unlock the power of creating and manipulating Excel files in C# effortlessly with IronXL, and elevate your development skills by mastering workbook creation, cell customization, and formula implementation without the need for Microsoft Excel! more... In this tutorial, learn to create Excel files in C# using IronXL, a library that supports the latest .NET framework versions. Start by installing IronXL via NuGet Package Manager. Import IronXL into your program file, allowing access to its features. Create a workbook using Workbook.Create, with XLSX as the default format. Add sheets and set cell values or formulas programmatically. Customize cell styling, including borders and background colors. Assign values and properties to cell ranges. Enhance text with different font styles and sizes. Implement formulas with ease and protect sheets from editing. Finally, save the Excel file using the Save As function. IronXL simplifies Excel operations without requiring Microsoft Excel or Excel Interop on your server, making it a versatile tool for developers.Further Reading: IronXL Documentation show less