how to bubble up a bool from inner contained class to outer contains class

I have 3 classes:

class A 
{
    public B b = new B();    
    public bool flag {get; set;}
}

class B
{
   piblic开发者_StackOverflow C c = new C();
}


class C
{
   public void foo()
    {
  //iterates a dataTable with column "someBoolCondition"
  // I want to set A's bool to true, after the first record that has 'true' in column
  //"someBoolCondition". Thus is thought to avoid bool memebers in each class.
    }
}

What it the best way set A's flag to 'true' from C's foo?

TIA

---

Your C can fire an event every time C changes its own bool. Your A can subscribe to event and update itself. You can also pass an abstracted interface of A to b and C for letting them push the change directly.

---

Another solution again, simplest form architectual point of view, but it's not clear to me if it's acceptable in your specific case, is just to have a static property in A class.

public class A 
{
     private static bool failed = false; 
     public static bool Failed {get {return failed;} set {failed=value;}}
}

and somewhere in the code in your foo() function:

foo(...) 
{
    //failure happens! 
    A.Failed = true;
}

This is easy and clear, but it depends if it's acceptable from you app architectural point of view.

Hope this helps.