How to quickly debug a NUnit test in Visual Studio

//-------------------------------------------------------------------------------------
// <copyright file='KeyValueXML.cs' company='Jonno'>
//     Copyright (c) Paul Johnson 2009 (email:paulmichael.johnson@gmail.com)
//     Code is released under The Code Project Open License (CPOL).
// </copyright>
//-------------------------------------------------------------------------------------

namespace Jonno.Utilities
{
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Xml;

    internal class KeyValueXML : KeyValueOptions
    {
        public KeyValueXML(string name, string folderPath)
        {
            this.Name = name;
            this.FolderPath = folderPath;
        }

        public string Name { private get; set; }

        public string FolderPath { private get; set; }

        public Dictionary<string, string> Load()
        {
            return this.LoadElements();
        }

        public void Save(Dictionary<string, string> options)
        {
            this.SaveElements(options);
        }

        private Dictionary<string, string> LoadElements()
        {
            var fileName = this.FolderPath + this.Name + ".xml";
            var list = new Dictionary<string, string>();

            if (!File.Exists(fileName))
            {
                return list;
            }

            var lastElementName = string.Empty;

            using (var reader = new XmlTextReader(fileName))
            {
                while (reader.Read())
                {
                    switch (reader.NodeType)
                    {
                        case XmlNodeType.Element:
                            {
                                lastElementName = reader.Name;
                            }

                            break;

                        case XmlNodeType.Text:
                            {
                                list.Add(lastElementName, reader.Value);
                            }

                            break;

                        default:
                            break;
                    }
                }
            }

            return list;
        }

        private void SaveElements(Dictionary<string, string> list)
        {
            var fileName = this.FolderPath + this.Name + ".xml";
            this.DeleteFile(fileName);

            var xmlDoc = this.CreateXmlDocument();

            this.CreateRootKey(xmlDoc, this.Name, string.Empty);

            foreach (var item in list)
            {
                var xmlElement = xmlDoc.CreateElement(string.Empty, item.Key, string.Empty);
                var xmltext = xmlDoc.CreateTextNode(item.Value);

                xmlElement.AppendChild(xmltext);
                xmlDoc.ChildNodes.Item(1).AppendChild(xmlElement);
            }

            this.SaveXMLDocument(xmlDoc, fileName);
        }

        private void CreateRootKey(XmlDocument xmlDoc, string name, string value)
        {
            var xmlElement = xmlDoc.CreateElement(string.Empty, name, string.Empty);
            var xmlText = xmlDoc.CreateTextNode(value);
            xmlElement.AppendChild(xmlText);
            xmlDoc.AppendChild(xmlElement);
        }

        private void SaveXMLDocument(XmlDocument document, string fileName)
        {
            try
            {
                document.Save(fileName);
            }
            catch (Exception)
            {
            }
        }

        private void DeleteFile(string fileName)
        {
            if (File.Exists(fileName))
            {
                try
                {
                    File.Delete(fileName);
                }
                catch (Exception)
                {
                }
            }
        }

        private XmlDocument CreateXmlDocument()
        {
            var xmlDoc = new XmlDocument();
            var xmlNode = xmlDoc.CreateNode(XmlNodeType.XmlDeclaration, string.Empty, string.Empty);
            xmlDoc.AppendChild(xmlNode);

            return xmlDoc;
        }
    }
}