Excel Automation and C#

D

David

With Office XP and C#.
using Excel = Microsoft.Office.Interop.Excel;

What's the difference between using these (with the "_")
Excel._Application oXL;
Excel._Workbook oWB;
Excel._Worksheet oSheet;

and these without the "_":
Excel.Application oXL;
Excel.Workbook oWB;
Excel.Worksheet oSheet;
 
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