Getting all types that implement an interface

Question

Using reflection, how can I get all types that implement an interface with C# 3.0/.NET 3.5 with the least code, and minimizing iterations?

This is what I want to re-

Answer 1

OfType Linq method can be used exactly for this kind of scenarios:

https://docs.microsoft.com/fr-fr/dotnet/api/system.linq.enumerable.oftype?view=netframework-4.8