[RESOLVED] [2.0] Return 2 types with generic parameters?

[high6]

    public class RoomCollection : List<Room>
    {
        public T IndexOfName<T>(string name)
        {
            if (!(typeof(T) == typeof(int)) && !(typeof(T) == typeof(Room)))
                throw new Exception("Invalid generic parameter!");
            for (int i = 0; i < this.Count; i++)
            {
                if (this[i].SiteID == name)
                {
                    if (typeof(T) == typeof(int))
                        return (T)(object)i;
                    return (T)(object)this[i];
                }
            }
            if (typeof(T) == typeof(int))
                return (T)(object)-1;
            return (T)(object)null;
        }
    }

I want to easily be able to choose what it returns so I made this. How do you properly do this?