Sum of Tree.cs

/*
 * Write a program that, given the root node of a tree, returns the sum of all its children.
 * 
 * Example, given the following tree:
 *                          50
 *                         /  \
 *                        20  30
 *                       /  \                               
 *                      70  80
 * The algorithm should return 250 ( 50 + 20 + 30 + 70 + 80 )
 * Each node is represented as follows: 
 */
  struct Node 
  {
      int nodeValue;
      Node leftNode;
      Node rightNode;
  }
 
 int getSum( Node rootNode ) 
 {
    //fill in solution here
 }