Is converting this ArrayList to a Generic List efficient?

Posted by Greg on Stack Overflow See other posts from Stack Overflow or by Greg
Published on 2010-06-07T18:19:11Z Indexed on 2010/06/07 18:22 UTC
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generics

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efficiency

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foreach

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arraylist

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unboxing

The code I'm writing receives an ArrayList from unmanaged code, and this ArrayList will always contain one or more objects of type Grid_Heading_Blk. I've considered changing this ArrayList to a generic List, but I'm unsure if the conversion operation will be so expensive as to nullify the benefits of working with the generic list. Currently, I'm just running a foreach (Grid_Heading_Blk in myArrayList) operation to work with the ArrayList contents after passing the ArrayList to the class that will use it.

Should I convert the ArrayList to a generic typed list? And if so, what is the most efficient way of doing so?

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