using System;

using System.Xml;

public class Program

{

    public static void Main()

    {

        string xml = @"<xml>

                              <Test1>

                                <Test1-Sub1>

                                  Testing 1 sub 1

                                </Test1-Sub1>

                                <Test1-Sub2>

                                  <Test1-Sub2-SubPart1>

                                    Testing Sub2-SubPart1

                                  </Test1-Sub2-SubPart1>

                                </Test1-Sub2>

                              </Test1>

                              <Test2>

                                <Test2-Sub1>

                                  <Test2-Sub1-SubPart1>

                                    Testing Sub1-SubPart1

                                  </Test2-Sub1-SubPart1>

                                 </Test2-Sub1>

                              </Test2>

                            </xml>";

​

            var builder = new XmlHierarchicalTextBuilder(xml);

            Console.WriteLine(builder.Build());   

    }

    public class XmlHierarchicalTextBuilder

    {

        private XmlDocument xmlDoc;

        private string hierarchicalText;

        private int indentlevel = 0;

​

        private const string NEW_LINE = "\n";

        private const string TAB = "\t";

        private const string PIPE = "|";

        private const string SPACE = " ";

​

        public XmlHierarchicalTextBuilder (string xml)

        {

            xmlDoc = new XmlDocument();

            xmlDoc.LoadXml(xml); 

        }

​

        public string Build()

        {

            Build(xmlDoc.DocumentElement);

            return hierarchicalText;

        }

​

        private void Build(XmlElement xmlElement) 

        {            

            if (xmlElement.HasChildNodes)

            {

                HandleXmlElementName(xmlElement);

​

                foreach (XmlNode item in xmlElement.ChildNodes)  

                {

                    indentlevel++;

​

                    if (item.NodeType == XmlNodeType.Text)

                    {

                        HandleXmlElementInnerText(xmlElement);                      

                    }

                    else if (item.NodeType == XmlNodeType.Element)

                    {

                        Build((XmlElement)item);

                    }

                    //add more conditions based on different xml node types in future, if u want

​

                    indentlevel--;

                }

            }           

        }

​

        private void HandleXmlElementInnerText(XmlElement xmlElement)

        {

            addIndent();

            hierarchicalText +=  PIPE + SPACE + xmlElement.InnerText.Trim();

            addNewLine(); 

        }

​

        private void HandleXmlElementName(XmlElement xmlElement)

        {

            addIndent();

            hierarchicalText += xmlElement.Name;

            addNewLine();

        }

​

        private void addIndent()

        {

            for (int i = 0; i < indentlevel; i++)

            {

                hierarchicalText += TAB;

            }

        }

​

        private void addNewLine()

        {

            hierarchicalText += NEW_LINE;

        }

    }

}