public void Update(Foo foo)
{
    UpdateFirstPart(foo.First);
    UpdateSecondPart(foo.Second);
    UpdateThirdPart(foo.Third);
}

class Foo
{
    public int Id;

    public Some1 First;

    public Some2 Second;

    public Some3 Third;
}

public void Update(Foo foo)
{
    lock(_locker)
    {
        UpdateFirstPart(foo.First);
        UpdateSecondPart(foo.Second);
        UpdateThirdPart(foo.Third);
    }
}