Microsoft.office.interop.excel Version 15.0.0.0 Apr 2026

Use Microsoft.Office.Interop.Excel only for desktop automation where Excel is already installed and user interaction is acceptable. For server-side (ASP.NET, Windows Service) or bulk processing, use Open XML SDK or EPPlus . 9. Summary Microsoft.Office.Interop.Excel version 15.0.0.0 is the official managed bridge to Excel 2013 . While powerful for desktop automation, it requires careful COM resource management, proper Excel installation, and attention to version compatibility. For new projects, consider embedding interop types or moving to lightweight libraries unless full Excel fidelity and macro execution are mandatory.

using Excel = Microsoft.Office.Interop.Excel; public void CreateExcelReport()

try

// Save file string savePath = @"C:\Reports\SalesReport.xlsx"; workbook.SaveAs(savePath, Excel.XlFileFormat.xlOpenXMLWorkbook);

Excel.Application excelApp = null; Excel.Workbook workbook = null; Excel.Worksheet worksheet = null; microsoft.office.interop.excel version 15.0.0.0

1. Overview Microsoft.Office.Interop.Excel is a primary interop assembly (PIA) provided by Microsoft to allow .NET applications (C#, VB.NET, F#) to communicate with Microsoft Excel through COM (Component Object Model). Version 15.0.0.0 corresponds to Microsoft Office 2013 .

catch (Exception ex)

| Aspect | Verdict | |--------|---------| | | Moderate (COM complexity) | | Performance | Slow for large data | | Reliability | High if coded carefully | | Deployment | Heavy (requires Office) | | Best suited for | Desktop reporting, user-driven automation, legacy integrations | Document Version: 1.0 Last Updated: 2025 Applicable to: .NET Framework 4.0 – 4.8, .NET Core (via interop compatibility pack with limitations)

Console.WriteLine("Error: " + ex.Message); Use Microsoft

// Release COM objects properly if (worksheet != null) System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet); if (workbook != null) System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook); if (excelApp != null) System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);

// Auto-fit columns Excel.Range usedRange = worksheet.UsedRange; usedRange.EntireColumn.AutoFit(); Summary Microsoft