Merge cells for Excel file using EasyXLS library! XLS, XLSX, XLSM, XLSB files in .NET.
http://www.easyxls.com/manual/tutorials/csharp/excel-merge-cells.html

Excel file page orientation (portrait, landscape), paper size, print area, page breaks by EasyXLS library! XLS, XLSX, XLSM, XLSB files in .NET.
http://www.easyxls.com/manual/tutorials/csharp/excel-print-area-page-orientation.html

Create Excel with header & footer in C#.NET, ASP.NET web pages or windows application by EasyXLS library! XLS, XLSX, XLSM, XLSB files in .NET.
http://www.easyxls.com/manual/tutorials/csharp/excel-footer-header.html

Excel cell comment in C#.NET from ASP.NET web pages or windows application by EasyXLS library! XLS, XLSX, XLSM, XLSB files in .NET. http://www.easyxls.com/manual/tutorials/csharp/excel-cell-comment.html

Protect Excel sheet and cells in C#.NET from ASP.NET web pages or windows application by EasyXLS library! XLS, XLSX, XLSM, XLSB files in .NET. http://www.easyxls.com/manual/tutorials/csharp/protect-excel-sheet-cells.html

Read data from XLSB Excel file in C++ by EasyXLS library! Excel spreadsheets in C++. http://www.easyxls.com/manual/tutorials/cpp/read-xlsb-file.html