Why the concept of "Covariance" and "Contravariance" are applicable while implementing the methods o
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Published on 2010-03-23T17:41:28Z
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2010/03/23
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The use case is some what like this:
public class SomeClass: IClonable
{
// Some Code
//Implementing interface method
Public object Clone()
{
//Some Clonning Code
}
}
Now my question is "Why is it not possible to use "SomeClass(As it is derivd from objec)" as a return type of Clone() method if we consider the Funda's of Covariance and Contravariance.
Can somebody explain me the reason behind this implemementaion of Microsoft ????
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