Why can't I pass List as a parameter to a method that accepts List<object>?

Question

The following code gives me this error:

Cannot convert from \'System.Collections.Generic.List\' to \'System.Collections.Generic.List\'.

Answer 1

That's the problem of covariance, and it is not as easy as it looks at first sight. C# 4 will have some support for that.

To get the idea of the problems, imagine in your case that this cast would actually work. Now you'h have a List