Out of memory exception analysing some code

Hi,

I keep getting out of memory exceptions due to the following code. (And I 
submitted a couple of them) The example code does not compile because of 
missing other classes, but my gui gets really slow even without the extra 
methods and classes.

Removing the line "using System.Xml" seems to solve the problem.


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;

namespace ConsoleApplication1
{
     public class XmlUtil
     {}

     class Program
     {

          static void Main(string[] args)
          {
               XmlDocument theXmlDoc = new XmlDocument();
               XmlUtil theXmlUtils = new XmlUtil(theXmlDoc);
                    // Namespace.DataTTTRegeling moet zijn 
NameSpace.TTTThing.Algemeen.DataTTTRegeling
                    XmlNodeList theNodeList = 
theXmlDoc.SelectNodes("//*");
                    foreach (XmlNode theNode in theNodeList) {
                         foreach (XmlAttribute attr in theNode.Attributes)
                              if (attr.Name == "type")
                                   attr.Value = "NameSpace.TTTThing.Algemeen.DataTTTRegeling";
                         XmlNode theChildNode = theXmlUtils.GetElement(0, "Fondsen_x0020_mix", 
null, theNode);
                         theNode.RemoveChild(theChildNode);
                         if (theChildNode != null)
                              theChildNode.Attributes.Append(theXmlDoc.CreateAttribute("type")).Value 
= "NameSpace.Dno.DataFondsMix";
                    }

                    // Namespace.DataTTTAanspraakGegevens moet zijn 
NameSpace.TTTThing.Algemeen.DataTTTAanspraakgegevens
                    theNodeList = 
theXmlDoc.SelectNodes("//*");
                    foreach (XmlNode theNode in theNodeList) {
                         foreach (XmlAttribute attr in theNode.Attributes)
                              if (attr.Name == "type")
                                   attr.Value = "NameSpace.TTTThing.Algemeen.DataTTTAanspraakgegevens";
                    }

                    theNodeList = 
theXmlDoc.SelectNodes("//*");
                    foreach (XmlNode theNode in theNodeList) {
                         foreach (XmlAttribute attr in theNode.Attributes)
                              if (attr.Name == "type")
                                   attr.Value = "NameSpace.Thing.DataAdministratieDeelnemer";
                    }

                    theNodeList = 
theXmlDoc.SelectNodes("//*");
                    foreach (XmlNode theNode in theNodeList) {
                         foreach (XmlAttribute attr in theNode.Attributes)
                              if (attr.Name == "type")
                                   attr.Value = "NameSpace.Thing.DataAdministratieAlgemeneDeelnemer";
                         theXmlUtils.RemoveElement(0, "Te_x0020_bereiken_x0020_inhaalThing", 
null, theNode);
                    }

                    // Namespace.DataTTTAanspraakVastSalaris moet zijn 
NameSpace.TTTThing.Algemeen.DataTTTAanspraakVastSalaris
                    theNodeList = 
theXmlDoc.SelectNodes("//*");
                    foreach (XmlNode theNode in theNodeList) {
                         foreach (XmlAttribute attr in theNode.Attributes)
                              if (attr.Name == "type")
                                   attr.Value = 
"NameSpace.TTTThing.Algemeen.DataTTTAanspraakVastSalaris";
                    }

                    // Namespace.DataTTTAlgemeneRegeling moet zijn 
NameSpace.TTTThing.Algemeen.DataTTTAlgemeneRegeling
                    theNodeList = 
theXmlDoc.SelectNodes("//*");
                    foreach (XmlNode theNode in theNodeList) {
                         foreach (XmlAttribute attr in theNode.Attributes)
                              if (attr.Name == "type")
                                   attr.Value = "NameSpace.TTTThing.Algemeen.DataTTTAlgemeneRegeling";

                         XmlNode theFranchiseNode = theXmlDoc.CreateNode(XmlNodeType.Element, 
null, "Franchise", null);
                         theFranchiseNode.Attributes.Append(theXmlDoc.CreateAttribute("type")).Value 
= "NameSpace.Thing.DataFranchise";
                         XmlNode theChildNode = theXmlUtils.GetElement(0, 
"Soort_x0020_franchise", null, theNode);
                         theNode.RemoveChild(theChildNode);
                         string theValue = theChildNode.InnerText;
                         theChildNode.InnerText = theValue == "AOWGehuwd" ? "AOW_Gehuwd_x1" : 
theValue == "AOWGehuwd2x" ? "AOW_Gehuwd_x2" : theValue;
                         theFranchiseNode.AppendChild(theChildNode);

                         XmlNode theFranchiseAnderAanvangsBedragNode = 
theXmlDoc.CreateNode(XmlNodeType.Element, null, 
"Ander_x0020_aanvangsbedrag", null);
                         theFranchiseAnderAanvangsBedragNode.Attributes.Append(theXmlDoc.CreateAttribute("type")).Value 
= "NameSpace.Thing.DataAanvangsbedrag";
                         theChildNode = theXmlUtils.GetElement(0, 
"Franchisebedrag_x0020_bij_x0020_aanvang", null, theNode);
                         theNode.RemoveChild(theChildNode);
                         theFranchiseAnderAanvangsBedragNode.AppendChild(theChildNode);
                         theChildNode = theXmlUtils.GetElement(0, 
"Toelichting_x0020_franchise", null, theNode);
                         theNode.RemoveChild(theChildNode);
                         theFranchiseAnderAanvangsBedragNode.AppendChild(theChildNode);
                         theNode.AppendChild(theFranchiseNode);
                         theFranchiseNode.AppendChild(theFranchiseAnderAanvangsBedragNode);
                    }

                    // XPath expression; Search and replace type-names
                    // Remove Interest percentage and replace it by the 
DataStaffelGeneratieInfo

                    theNodeList = 
theXmlDoc.SelectNodes("//*");
                    foreach (XmlNode theXmlNode in theNodeList) {
                         theXmlUtils.RemoveElement(0, "Interest", null, theXmlNode);

                         theXmlNode.AppendChild(theXmlDoc.CreateNode(XmlNodeType.Element, 
null, "Staffel_x0020_Generator", null));
                    }

                    // Begin Salaris Conversie
                    foreach (XmlNode theXmlNode in 
theXmlDoc.SelectNodes("//*"))
                         if (theXmlNode.Name == "Algemene_x0020_regeling") {
                              string theSalarisOmschrijving = "Jaarsalaris incl. vakantiegeld";
                              string theSalarisOpbouwOmschrijving = (string) 
theXmlUtils.GetValueFromElement(0, "Salaris_x0020_opbouw", null, typeof 
(string), theXmlNode);
                              bool theDertiendeMaand = false;
                              EPeriode theSalarisPeriode = EPeriode.Jaar;

                              if (theSalarisOpbouwOmschrijving.StartsWith("12,96")) {
                                   theSalarisPeriode = EPeriode.Maand;
                                   theDertiendeMaand = false;
                              } else if (theSalarisOpbouwOmschrijving.StartsWith("13,96")) {
                                   theSalarisPeriode = EPeriode.Maand;
                                   theDertiendeMaand = true;
                              } else if (theSalarisOpbouwOmschrijving.StartsWith("14,04")) {
                                   theSalarisPeriode = EPeriode.VierWeken;
                                   theDertiendeMaand = false;
                              }
                              theSalarisOmschrijving = theSalarisOpbouwOmschrijving;
                              theXmlUtils.RemoveElement(0, "Salaris_x0020_opbouw", null, 
theXmlNode);

                              XmlNode theNewBVSNode = theXmlDoc.CreateNode(XmlNodeType.Element, 
null, "Bestandsdelen_x0020_Vast_x0020_Salaris", null);
                              theNewBVSNode.Attributes.Append(theXmlDoc.CreateAttribute("type")).Value 
= "NameSpace.Thing.DataBestandsdelenVastSalaris";

                              XmlNode theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, 
null, "Vakantie_x0020_Geld", null);
                              theNewXmlNode.InnerText = "True";
                              theNewBVSNode.AppendChild(theNewXmlNode);
                              theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, null, 
"Vast_x0020_Salaris_x0020_Per", null);
                              theNewXmlNode.InnerText = theSalarisPeriode.ToString();
                              theNewBVSNode.AppendChild(theNewXmlNode);
                              theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, null, 
"Dertiende_x0020_Maanden", null);
                              theNewXmlNode.InnerText = theDertiendeMaand ? "True" : "False";
                              theNewBVSNode.AppendChild(theNewXmlNode);
                              theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, null, 
"Overige_x0020_Inkomsten", null);
                              theNewXmlNode.InnerText = "False";
                              theNewBVSNode.AppendChild(theNewXmlNode);
                              theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, null, 
"Overige_x0020_Inkomsten_x0020_Per", null);
                              theNewXmlNode.InnerText = "Jaar";
                              theNewBVSNode.AppendChild(theNewXmlNode);
                              theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, null, 
"Omschrijving", null);
                              theNewXmlNode.InnerText = theSalarisOmschrijving;
                              theNewBVSNode.AppendChild(theNewXmlNode);

                              theXmlNode.ParentNode.AppendChild(theNewBVSNode);
                         }

                    foreach (XmlNode theXmlNode in 
theXmlDoc.SelectNodes("//*"))
                         if (theXmlNode.Name == "Periodieke_x0020_gegevens") {
                              double theJaarSalaris = (double) theXmlUtils.GetValueFromElement(0, 
"Vast_x0020__x0028_parttime_x0029__x0020_salaris", null, typeof (double), 
theXmlNode);
                              theXmlUtils.RemoveElement(0, 
"Vast_x0020__x0028_parttime_x0029__x0020_salaris", null, theXmlNode);

                              string theRegelingID = (string) theXmlUtils.GetValueFromElement(0, 
"Regeling_x0020_ID", null, typeof (string), theXmlNode.ParentNode);
                              XmlNode theRegelingBVSNode = null;
                              foreach (XmlNode theBVSNode in 
theXmlDoc.SelectNodes("//*"))
                                   if (theRegelingID == (string) theXmlUtils.GetValueFromElement(0, 
"StoredObjectID", null, typeof (string), 
theBVSNode.ParentNode.ParentNode)) {
                                        theRegelingBVSNode = theBVSNode;
                                        break;
                                   }

                              if (theRegelingBVSNode == null)
                                   throw new NullReferenceException("Conversie: Er is geen regeling 
met ID = " + theRegelingID);

                              EPeriode theVastSalarisPer = (EPeriode) 
theXmlUtils.GetValueFromElement(0, "Vast_x0020_Salaris_x0020_Per", null, 
typeof (EPeriode), theRegelingBVSNode);
                              bool theDertiendeMaand = (bool) theXmlUtils.GetValueFromElement(0, 
"Dertiende_x0020_Maanden", null, typeof (bool), theRegelingBVSNode);

                              double theDeelFactor = 0;

                              if (theVastSalarisPer == EPeriode.Maand) {
                                   if (theDertiendeMaand) {
                                        theDeelFactor = 13.96;
                                   } else {
                                        theDeelFactor = 12.96;
                                   }
                              } else if (theVastSalarisPer == EPeriode.VierWeken && 
!theDertiendeMaand) {
                                   theDeelFactor = 14.04;
                              } else if (theVastSalarisPer == EPeriode.Jaar && !theDertiendeMaand) 
{
                                   theDeelFactor = 1.08;
                              }

                              XmlNode theNewSGNode = theXmlDoc.CreateNode(XmlNodeType.Element, 
null, "Vast_x0020__x0028_parttime_x0029__x0020_salaris", null);
                              theNewSGNode.Attributes.Append(theXmlDoc.CreateAttribute("type")).Value 
= "NameSpace.Thing.DataSalarisGegevens";

                              XmlNode theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, 
null, "Vast_x0020_Salaris_x0020_Per_x0020_Periode", null);
                              theNewXmlNode.InnerText = (theJaarSalaris / 
theDeelFactor).ToString();
                              theNewSGNode.AppendChild(theNewXmlNode);

                              theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, null, 
"Dertiende_x0020_Maanden", null);
                              theNewXmlNode.InnerText = theDertiendeMaand ? (theJaarSalaris / 
theDeelFactor).ToString() : "0";
                              theNewSGNode.AppendChild(theNewXmlNode);

                              theNewXmlNode = theXmlDoc.CreateNode(XmlNodeType.Element, null, 
"Overige_x0020_Inkomsten_x0020_Per_x0020_Periode", null);
                              theNewXmlNode.InnerText = "0";
                              theNewSGNode.AppendChild(theNewXmlNode);

                              theXmlNode.AppendChild(theNewSGNode);
                         }
                    // Einde Salaris Conversie

          }
     }
}