Below is my problem.  I've narrowed it down to one thing:  my
unfamiliarity on how class instances are instantiated in an array.
This is because the "un-array" / "non-array" version of the program
works fine (see below).  So what is the problem?  I get a null
reference on the line below at *!&!* "Unhandled Exception:
System.NullReferenceException: Object reference not set to
an instance of an object.?

RL

static void Main(string[] args)
       {

           int Array_Max1 = 5; // the size of the array

           NodeTreeMgr[] myNodeTreeMgr = new NodeTreeMgr[Array_Max1];
//the array version of the class (compiles but gets runtime error)
// the problem is perhaps here--somehow the 'new' is not working in
this array

           NodeTreeMgr mySingleNodeTreeMgr = new NodeTreeMgr();
// the non-array version of the class (works fine)

           MyClass rootClass = new MyClass(123); //unimportant nested
class

           Node[] myrootnode = new Node[Array_Max1];
          //  a class on the "LHS" of the "=" below

           Node[] myBADrootnode = new Node[Array_Max1];
          //same as previous line

           for (int i = 0; i < 5; i++) //start of loop
           {

myrootnode[i] =
mySingleNodeTreeMgr.TheNodeTree.NodeFactory(rootClass);
//works fine in runtime--since the RHS is a "non-array"

Console.WriteLine("success! myrootnode[{0}].child_TorF is {1}", i,
myrootnode[i].child_TorF);  //works fine, returns a member bool
"false"

// start of problem code: *!&!*  next line a problem, exception is
thrown

myBADrootnode[i] =
myNodeTreeMgr[i].TheNodeTree.NodeFactory(rootClass);

// if the above line is commented out, program works fine (loop runs
five times)

                Console.WriteLine("NO success! WON'T WORK! (runtime
error): myBADrootnode[{0}].child_TorF is {1}", i,
myBADrootnode[i].child_TorF);  //doesn't work

           }

}

////////// output

success! myrootnode[0].child_TorF is False

Unhandled Exception: System.NullReferenceException: Object reference
not set to
an instance of an object.

Press any key to continue . . .

/////////////////////// FYI OTHER CLASSES BELOW /////

 class NodeTreeMgr
   {
       public NodeTree TheNodeTree;

       public Node NodeFactory(MyClass MyClaPass) //standard "Node
factory" class
       {
           Node returnNode = new Node();
           returnNode.Val = MyClaPass;
           return returnNode;
       }
   }

///////////////////////

class Node
   {
       public bool child_TorF;

       public Node()
       {
           child_TorF = false;
       }

     }

       private MyClass val; //val needed for below "Val"
       public MyClass Val
       {
           get
           {
               return val;
           }
           set
           {
               val = value;  //taking advantage of 'special variable
'value'
           }
       }

   }

   public class MyClass
   {
     public int j; public String STR1;
     public MyClass() { STR1 = "hi"; j = 1; }
     public MyClass(int jj) { j=jj;}
   }

///////////////////////