Does creating new Processes help me for Traversing a big tree?

Let's think of it as a family tree, a father has kids, those kids have kids, those kids have kids, etc... So I have a recursive function that gets the father uses Recursion to get the children and for now just print them to debug output window...But at some point ( after one hour of letting it run and printing like 26000 rows) it gives me a StackOverFlowException.

So Am really running out of memory? hmmm? then shouldn't I get an "Out of memory exception"? on other posts I found people were saying if the number of recursive calls are too much, you might still get a SOF exception...

Anyway, my first thought was to break the tree into smaller sub-strees..so I know for a fact that my root father always has these five kids, so Instead of Calling my method one time with root passed to it, I said ok call it five times with Kids of root Passes to it.. It helped I think..but still one of them is so big - 26000 rows when it crashes - and still have this issue.

How about Application Domains and Creating new Processes at run time at some certain level of depth? Does that help?

How about creating my own Stack and using that instead of recursive methods? does that help?

here is also a high-level of my code, please take a look, maybe there is actually something silly wrong with this that causes SOF error:

private void MyLoadMethod(string conceptCKI)
{

// make some script calls to DB, so that moTargetConceptList2 will have Concept-Relations for the current node. 

            // when this is zero, it means its a leaf. 
            int numberofKids = moTargetConceptList2.ConceptReltns.Count();
            if (numberofKids == 0)
                return;
            for (int i = 1; i <= numberofKids; i++)
            {
                oUCMRConceptReltn = moTargetConceptList2.ConceptReltns.get_ItemByIndex(i, false);

                //Get the concept linked to the relation concept
                if (oUCMRConceptReltn.SourceCKI == sConceptCKI)
                {
                    oConcept = moTargetConceptList2.ItemByKeyConceptCKI(oUCMRConceptReltn.TargetCKI, false);
                }
                else
                {
                    oConcept = moTargetConceptList2.ItemByKeyConceptCKI(oUCMRConceptReltn.SourceCKI, false);
                }

                //builder.AppendLine("\t" + oConcept.PrimaryCTerm.SourceString);
                Debug.WriteLine(oConcept.PrimaryCTerm.SourceString);

                MyLoadMethod(oConcept.ConceptCKI);
            }
        }