What are the practical uses of covariance in C#?
An example of an AI chatbot conversation about practical uses of covariance in C#.
What are the practical uses of covariance in C#?
Covariance allows you to use a more derived type than originally specified. It's useful in scenarios like collections.
Can you give me an example of how covariance works in a collection?
Sure! If you have a method that returns an IEnumerable<BaseClass>, you can return an IEnumerable<DerivedClass> instead.
Are there any limitations I should be aware of when using covariance?
Yes, covariance can only be applied to output parameters, not input parameters. So, it’s limited to certain scenarios.
How does covariance differ from contravariance?
Covariance allows a method to return a more derived type, while contravariance allows a method to accept a less derived type.
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