C# newbie List<Interface> question

Posted by newB on Stack Overflow See other posts from Stack Overflow or by newB
Published on 2009-08-04T15:29:16Z Indexed on 2010/05/30 1:12 UTC
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c#

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generics

If you have an Interface IFoo and a class Bar : IFoo, why can you do the following:

List<IFoo> foo = new List<IFoo>();  
foo.Add(new Bar());

But you cannot do:

List<IFoo> foo = new List<Bar>();

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