https://docs.microsoft.com/en-us/dotnet/standard/generics/covariance-and-contravariance
Covariance and Contravariance in Generics
Covariance and Contravariance in Generics In this article --> Covariance and contravariance are terms that refer to the ability to use a more derived type (more specific) or a less derived type (less specific) than originally specified. Generic type parame
docs.microsoft.com
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