question about opening an excel object

i need to make a simple program that loops though a list of excel files and copy/past 1 row to a master excel sheet.

i see that i have several options to create excel objects:

* using a connectionstring OLEDB
* use Excel Reference (Microsoft.Office.Interop.Excel)

What's the best way to do this? i want the option that is less dependent on the excel version of the end user (so it should work on both Excel 2007 and Excel 2010). And i don't want to install extra drivers like a OLEDB connector.

I have Excel 2010 installed on my laptop, endusers have Excel 2003 or Excel 2007
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I'd suggest using MS Office Interop. The latest version is backward compatible. Copy / paste of a row for Excel 2003 - 2010 should not have any problem.
If you want it to be version agnostic, use the dynamic approach (CreateObject).

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Ollie90Author Commented:
ok, two different answers :)

my first thought was also interop because of the backward compatible ..

@CodeCruiser, why CreateObject instead of interop?
Microsoft does not guarantee that the Office PIAs will be backwardly compatible;en-us;840585
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