How to "cast" from generic List<> to ArrayList

Posted by Michael Freidgeim on Geeks with Blogs See other posts from Geeks with Blogs or by Michael Freidgeim
Published on Sun, 06 Jun 2010 02:10:34 GMT Indexed on 2010/06/06 2:23 UTC
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We are writing new code using generic List<> , e.g. List<MyClass>.

 

However we have legacy functions, that are expect ArrayList as a parameter.

It is a second time, when I and my colleague asked, how to "cast" generic List<MyClass> to ArrayList.

The answer is simple- just use ArrayList constructor with ICollection parameter.

Note that it is not real cast, it  copies  references to ArrayList.

var list=new List<MyClass>();

//Fill list items

ArrayList al=new ArrayList(list);//"cast"- 
 

 

 

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