int abc = 7;

try {
    SomeMethod();
} catch (SomeException e) {
    // here e is unused, but during debug we can inspect exception details
    DoSomethingAboutIt();
}

SomeClass Func() {
    // ...stuff...
    var ret = FinalComputationResult(thing, foo, bar);
    // ret is unused, but while debugging allows checking return value.
    return ret;
}