Interface type parameter covariance and contravariance in C#

  • I would like this blog post to serve as a quick reference that recalls the basic concept of covariant and contravariant type parameters of generic interfaces in the C# language.
  • I tried to keep the example as simple as possible. Included comments explain the key points. No long stories and no dissertations.
  • The code does nothing, but compiles on C# 4.0 or newer compiler.
  • Try deleting the first slash character in the first line to kind of switch between the snippets (BTW this is cool trick 🙂 ).

One comment

  1. Interface type parameter covariance and contravariance in C# | PJSen Blog…

    Dziękujemy za dodanie artykułu – Trackback z dotnetomaniak.pl…

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