using System;

using System.Xml;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var xml = @"<Element>

  <Children>

    <Element>

      <Messages>

        <Message type=""0"">

          <Text>[MutationEngine:CraSyncMutationEngine]</Text>

        </Message>

      </Messages>

      <Children>

        <Element>

          <Messages>

            <Message type=""0"">

              <Text>[Stage:'StageLoad']</Text>

            </Message>

            <Message type=""0"">

              <Text>[Stage:'StageMergeWithPi']</Text>

            </Message>

            <Message type=""0"">

              <Text>[Stage:'StageSaveRelationImage']</Text>

            </Message>

          </Messages>

          <Children>

            <Element>

              <Messages>

                <Message type=""0"">

                  <Text>[PreValidate]</Text>

                </Message>

              </Messages>

            </Element>

            <Element>

              <Messages>

                <Message type=""0"">

                  <Text>[Action:'LoadPersistedInput']</Text>

                </Message>

              </Messages>

            </Element>

          </Children>

        </Element>

      </Children>

    </Element>

  </Children>

</Element>";

            var doc = new XmlDocument();

            doc.LoadXml(xml);

            var nodesHavingInnerText = doc.DocumentElement.SelectNodes("//*[normalize-space(text())]");

            var result = "";

            foreach (XmlNode node in nodesHavingInnerText)

            {

                result += string.Concat(Enumerable.Repeat("-", GetLevel(node))) + node.InnerText + Environment.NewLine;

            }

            Console.WriteLine(result);

    }

    public static int GetLevel(XmlNode node)

        {

            if (node.ParentNode == null) return 0;

            return 1 + GetLevel(node.ParentNode);

        }

}