GemBox.Spreadsheet 2025.12.105

What is GemBox.Spreadsheet?

GemBox.Spreadsheet is a .NET component that enables you to read, write, convert, and print spreadsheet files (XLSX, XLS, XLSB, CSV, HTML, and ODS) from .NET applications.

With GemBox.Spreadsheet you get a fast and reliable component that’s easy to use and doesn't depend on Microsoft Excel. It requires only .NET and it’s much faster than Microsoft Office Automation!

GemBox.Spreadsheet Features

Get Started

You are not sure how to start working with Excel spreadsheets in .NET using GemBox.Spreadsheet? Check the code below that shows how to create an XLSX file from scratch and write 'Hello World!' in first cell

// If using Professional version, put your serial key below.
SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

// Create a new empty workbook.
var workbook = new ExcelFile();

// Add a worksheet to it.
var worksheet = workbook.Worksheets.Add("Sheet1");

// Write to the first cell.
worksheet.Cells["A1"].Value = "Hello World!";

// Save the workbook as Excel's XLSX file.
workbook.Save("Writing.xlsx");

For more GemBox.Spreadsheet code examples and demos, please visit our examples page.

Resources

No packages depend on GemBox.Spreadsheet.

Fixed issue with data validations from extension list overriding existing ones in XLSX reader. Added support for CalculationOptions.CalculationMode in XLSB files. Improved performance of rendering images. Fixed issue with chart axes positioning and automatic scale calculation. Fixed issue with preserved VBA relationship in XLSX writer. Fixed issue with ExcelWorksheet.Clear not removing ExcelWorksheet.Tables. Fixed issue with calculating formulas that reference tables with external data.

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2025.12.105 2 18.12.2025
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