Find Implementations In Same Assembly even generics

FindImplementationsInSameAssemblyAs.cs

    public static class ReflectionExtensions
    {
        public static void FindImplementationsInSameAssemblyAs<T>(
            this Type type,
            Action<Type, Type> action)
        {
            var assembly = typeof(T).GetTypeInfo().Assembly;

            var query =
                from implementationType in assembly.GetTypes()
                let implementationTypeInfo = implementationType.GetTypeInfo()
                where !implementationTypeInfo.IsInterface && !implementationTypeInfo.IsAbstract
                from serviceType in implementationType.GetInterfaces()
                where serviceType.IsAssignableFrom(type)
                      || serviceType.IsGenericTypeDefinition(type)
                      || serviceType.GetInterfaces().Any(i => i.IsGenericTypeDefinition(type))
                select new {serviceType, implementationType};

            foreach (var a in query)
            {
                Debug.WriteLine($"{a.serviceType} => {a.implementationType}");
                action(a.serviceType, a.implementationType);
            }
        }

        public static bool IsGenericTypeDefinition(
            this Type type, Type otherType)
        {
            return type.GetTypeInfo().IsGenericType
                   && type.GetGenericTypeDefinition() == otherType;
        }
    }