Exchange data between Excel and .NET app. without Interop.Excel.dll (900K).
BSEditor: It is a simple .NET module (Excel.cs) to assist in the exchange data Between Excel and .NET using COM but without using Interop.Excel.dll (900K), Iterop.Office.dll(150K), Interop.VBIDE.dll. Full source code and exe-demo application included.
This module is FREEWARE .

Demo code:

using ( Sheet sh = excel.Workbooks[1].ActiveSheet()) {
using ( Range r = sh.Ranges[R1C5]) {
r.Value = 123;
r.Font.Bold = true;
r.Font.Name = Times New Roman ;
r.Font.Color = System.Drawing.Color.Red;
r.HorizontalAlignment = Excel.xlHAlign.xlHAlignCenter;
}
}

converting data from DataGridView to MsExcel:

Excel.dataGridViewToExcel( 1, 1, yourDataGridView, null, null); you can free download NkExcel 1.1.2.0 now.