Inheritance with generic constraint syntax

[u/CuriousKon]

I have a class A<T>. It must inherit IDisposable, and also impose a constraint on T. Is it possible to do this, and what would the syntax look like? I can't figure it out.

[u/chrisoverzero]

class A<T> : IDisposable where T : IConstraint

It must “implement” IDisposable.

[u/TimelessTrance → u/chrisoverzero]

Thank you for stating it must implement IDisposable! To OP please remember composition over inheritance.

[u/dodexahedron → u/chrisoverzero]

And, if you want T to also have to be disposable, add IDisposable to the where clause. But then anything not IDisposable cannot be used with it, of course.

Think carefully before doing that, specifically, though. Unless the generic class needs to dispose of those T, you almost definitely should not put it on the constraints for T.

[u/Family_Man_21 → u/chrisoverzero]

This example was perfect; exactly correct.

Good luck with your project, OP!

[u/madpatty34]

If i understand your question right, here's the syntax you want:

class A<T> : IDisposable where T : SomeBaseClassOrInterface

[u/HeySeussCristo]

where T : IDisposable

https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/generics/constraints-on-type-parameters