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-write:

foreach (Type t in this.GetType().Assembly.GetTypes())     if (t is IMyInterface)         ; //do stuff 

Answer 1

Mine would be this in c# 3.0 :)

var type = typeof(IMyInterface); var types = AppDomain.CurrentDomain.GetAssemblies()     .SelectMany(s => s.GetTypes())     .Where(p => type.IsAssignableFrom(p)); 

Basically, the least amount of iterations will always be:

loop assemblies    loop types     see if implemented.