How to Read Excel Files in C# using IronXL ByRegan Pun April 19, 2022 Updated June 22, 2025 Share: Unlock the power of Excel file manipulation in C# by watching this tutorial, which guides you through using IronXL to effortlessly read and analyze data, enhancing your programming toolkit with practical examples and expert support! more... In this tutorial, we delve into reading Excel files in C# using the IronXL library, which is free for development use. We begin by installing the IronXL package through the package manager console. First, add the namespace 'using IronXL' to your code. Next, load the desired Excel workbook with the 'Workbook.Load' method, specifying the file path and name. Once loaded, you can select the worksheet using 'Workbook.GetWorksheet'. A loop is employed to read data from cells A1 to A10, displaying the values in the console. Additionally, the tutorial demonstrates using aggregate functions to calculate sum and max values from the data range using LINQ. The tutorial concludes by highlighting that similar methods can be employed for other aggregate functions like min and average. For further assistance, the support team is available to help users facing any challenges.Further Reading: How to Read Excel Files in C# (Developer Tutorial) show less