// Convert the contents of the specified security element
    // to hash codes stored in a hash table.
    private static void ConvertToHashTable(SecurityElement xmlElement)
    {
        // Create a hash table to hold hash codes of the security elements.
        //<Snippet16>
        Hashtable xmlAsHash = new Hashtable();
        int       rootIndex = xmlElement.GetHashCode();

        xmlAsHash.Add(rootIndex, "root");
        //</Snippet16>

        int parentNum = 0;

        foreach (SecurityElement xmlParent in xmlElement.Children)
        {
            parentNum++;
            xmlAsHash.Add(xmlParent.GetHashCode(), "parent" + parentNum);
            if ((xmlParent.Children != null) &&
                (xmlParent.Children.Count > 0))
            {
                int childNum = 0;
                foreach (SecurityElement xmlChild in xmlParent.Children)
                {
                    childNum++;
                    xmlAsHash.Add(xmlChild.GetHashCode(), "child" + childNum);
                }
            }
        }
    }