Can't cast GetTypes() to interfaces

I'm scanning a particular namespace for types that implement an interface, and trying to return them as that interface rather than just Type, but i'm getting an InvalidCastException

IEnumerable<IGameScript> GetDemos()
{
    var results = Assembly.GetExecutingAssembly().GetTypes()
        .Where(
        x => x.IsClass 
        && x.Namespace == "MMOCl开发者_运维问答ass.CodeBase.Demos" 
        && x.Name.Contains("Demo") 
        && x.GetInterfaces().Contains(typeof(IGameScript))
        ).Select(x => x);

    return results.Cast<IGameScript>();
}

Update in response to Reed's answer:

IEnumerable<IGameScript> GetDemos()
{
    var results = Assembly.GetExecutingAssembly().GetTypes()
        .Where(
        x => x.IsClass 
        && x.Namespace == "MMOClass.CodeBase.Demos" 
        && x.Name.Contains("Demo") 
        && x.GetInterfaces().Contains(typeof(IGameScript))
        ).Select(x => Activator.CreateInstance(x) as IGameScript);

    return results;
}

---

Your LINQ query returns a collection of Types (IEnumerable<System.Type>) which implement the interface, not a collection of objects of that type.

However, you're trying to return an IEnumerable<IGameScript>, which would be a list of instances of objects that implement that interface. You'll need to construct instances in order to cast to the interface itself.

---

Assuming you have default constructors, you can simple reform your Select LINQ call to something like this and actually get the instances of that type:

.Select(x => Activator.CreateInstance(x))