4 ms·

For what it's worth 4.0 also added co-variant and contra-variant generics which are surprisingly useful.

• gouranga 14y ago
  I've written about 400kloc in C# 4.0 and I haven't had a need yet :(
  • Yrlec 14y ago
    How is that ironic?
    • gouranga 14y ago
      Corrected - thank you :)
• profquail 14y ago
  Co- and contra-variant generics have been available since .NET 2.0 -- they just weren't exposed by any "standard" .NET language until C# 4 (which coincided with .NET 4.0).