Use Reflection to create instance of all implementations of an interface.

interface-implementation.cs

var implementations = Assembly.GetExecutingAssembly().GetTypes()
    .Where(x => typeof(IInterface).IsAssignableFrom(x) &&
                !x.IsInterface &&
                !x.IsAbstract &&
                x.IsClass &&
                x.IsPublic)
    .Select(x => Activator.CreateInstance(x) as IInterface);