令人惊讶，似乎要做到这一点是通过反射的唯一途径。

Surprisingly, it seems the only way to do this is via reflection.

private IEnumerable<Component> EnumerateComponents()
{
    return from field in GetType().GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
           where typeof (Component).IsAssignableFrom(field.FieldType)
           let component = (Component) field.GetValue(this)
           where component != null
           select component;
}