Customizing cell backgrounds in Excel is one of the fastest ways to transform a plain data dump into a professional, scannable report. Whether you need to highlight headers, flag key metrics, or add visual polish to dashboards, the Free Spire.XLS for .NET library makes it easy to apply solid fills, texture patterns, and gradient effects programmatically.
In this guide, you'll learn how to implement each style with concise C# examples.
Prerequisites
Install the library via NuGet Package Manager:
Install-Package FreeSpire.XLS
