Question

Just started learning C# (in xaml), so appreciate some elaboration:

((MSAvalon.Windows.Serialization.ILoaded)(_Text_2_)).DeferLoad();

Not sure what all the round brackets means… does it mean “_Text_2_” is a child of object “MSAvalon.Windows.Serialization.ILoaded” ?

and if so… why not just something like:

MSAvalon.Windows.Serialization.ILoaded._Text_2.DeferLoad();

Answer 1

This is a typecast, used to tell the compiler that a variable is of a particular type when it’s not obvious. It could have been used like this:

class Foo {
    private object _Text_2_;

    void Method() {
        ((MSAvalon.Windows.Serialization.ILoaded)_Text_2_).DeferLoad();
    }
}

Leaving out the typecast here would cause a compiler error, since DeferLoad is not a method of object. You’re telling the compiler here that you have some special knowledge that _Text_2_ is really what you say it is.