Read large data from Excel file with fast reading time in C#, VB.NET, Java, PHP, C++ and other programming languages! The supported Excel file formats are XLSX, XLSM, XLS and XLSB.
http://www.easyxls.com/manual/tips-and-tricks/read-large-excel-file.html
Read Excel file in C# and VB.NET. Read entire sheet data or only data from a range of cells.
http://www.easyxls.com/manual/FAQ/read-excel-file-in-dot-net.html