Getting all types that implement an interface in .NET Core

Using reflection, How can I get all types that implement some specific interface in .NET Core? I have noticed that the methods usable in .NET 4.6 are not available anymore.

For example, this code doesn't work.

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

It throws The name 'AppDomain' does not exist in the current context error.