using System;

using System.Linq;

using System.Xml;

using System.Xml.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        //var xml = @"<Root><w:r xmlns:w=""http://schemas.openxmlformats.org/wordprocessingml/2006/main""><w:t xml:space=""preserve"">If the party is at night, then I will not </w:t></w:r><w:r xmlns:w=""http://schemas.openxmlformats.org/wordprocessingml/2006/main""><w:t xml:space=""preserve"">5b3c8ced-0798-41df-810c-3f54d414853b</w:t></w:r><w:r xmlns:w=""http://schemas.openxmlformats.org/wordprocessingml/2006/main""><w:t xml:space=""preserve""> go</w:t></w:r><w:r xmlns:w=""http://schemas.openxmlformats.org/wordprocessingml/2006/main""><w:br /></w:r></Root>";

        //var xml = @"<Root><w:r xmlns:w=""http://schemas.openxmlformats.org/wordprocessingml/2006/main""><w:br /></w:r></Root>";

        var xml = @"

<w:r xmlns:w=""http://schemas.openxmlformats.org/wordprocessingml/2006/main"">

  <w:rPr>

    <w:color val=""000000"" />

    <w:sz val=""24"" />

    <w:szCs val=""24"" />

  </w:rPr>

  <w:rPr>

    <w:rStyle val=""Quote"" />

  </w:rPr>

  <w:t space=""preserve""> « </w:t>

</w:r>";

        string firstItem = string.Empty;

        var doc = XDocument.Parse(xml);

//Removing w:r tag when w:br found inside the w:r tag -- Start

//Not working

        //doc.Descendants().Where(x => x.Name.LocalName.Equals("r") && (x.Elements(XName.Get("br")).Count() > 0)).Remove();

        //foreach(XElement items in doc.Descendants().Where(x => x.Name.LocalName.Equals("r") && (x.Elements(XName.Get("br")).Count() == 0 ) ))

        //{             

        //  Console.WriteLine(items);

        //  items.Remove();

        //}             

        //doc.Descendants().Where(x => x.Name.LocalName.Equals("br") && x.Parent.Name.LocalName.Equals("r")).Remove();

        //foreach(XElement items in doc.Descendants().Where(x => x.Name.LocalName.Equals("br") && x.Parent.Name.LocalName.Equals("r") ))

        //{             

        //  Console.WriteLine(items);

        //  items.Remove();

        //}     

        //foreach(XElement xelement in doc.Descendants().Where(x => x.Name.LocalName.Equals("r")))

        //{

        //  foreach(XElement xelements in xelement.Descendants().Where(y => y.Name.LocalName.Equals("br")))

        //  {

        //      Console.WriteLine(xelements);               

        //  }           

        //}             

        //foreach(XElement xelement in doc.Descendants().Where(x => x.Name.LocalName.Equals("r")))

        //{

        //  XElement brElement = xelement.Descendants().Where(y => y.Name.LocalName.Equals("br")).FirstOrDefault();

        //  if (brElement != null)

        //  {

        //      Console.WriteLine(xelement);

        //  }           

        //}

//Working

        //doc.Descendants().Where(x => x.Name.LocalName.Equals("br")).Select(i => i.Parent).Where(y => y.Name.LocalName.Equals("r")).Remove();

        //Console.WriteLine(doc);

//Removing w:r tag when w:br found inside the w:r tag -- End    

​

//Adding Inntertext or element inside the current enelment -- Start

        //foreach(XElement xelement in doc.Descendants().Where(x => x.Name.LocalName.Equals("r")))

        //{

        //  XElement brElement = xelement.Descendants().Where(y => y.Name.LocalName.Equals("br")).FirstOrDefault();

        //  if (brElement != null)

        //  {

        //      //xelement.ReplaceNodes("No items available");

        //      //xelement.ReplaceNodes(new XText("No items available"));

        //      xelement.ReplaceNodes(

        //                  new XText("This item is "),

        //                  new XElement("b", "sold out"),

        //                  new XText("! Get it while you can."));

        //  }           

        //}     

//Adding Inntertext or element inside the current enelment -- End       

//Fetching element --Start      

        //foreach (XElement item in doc.Root.Elements())

        //{

        //  if (item.Name.LocalName.Equals("r"))

        //  {

        //      firstItem = item.ToString();    

        //      break;

        //  }

        //}

        //var docN = XDocument.Parse(firstItem);

        //Console.WriteLine(docN.Root.FirstNode.ToString());

//Fetching element --End    

//To Getting w:r tag when only w:br found inside the w:r tag -- Start

        //foreach(XElement item in doc.Descendants().Where(x => x.Name.LocalName.Equals("br")).Select(i => i.Parent).Where(y => y.Name.LocalName.Equals("r") && (y.FirstNode.ToString() == "<w:br xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\" />")))

        //{

        //  Console.WriteLine(item.ToString());

        //}         

//To Getting w:r tag when only w:br found inside the w:r tag -- End

​

//To Removing w:r tag when only w:br found inside the w:r tag -- Start

        //doc.Descendants().Where(x => x.Name.LocalName.Equals("br")).Select(i => i.Parent).Where(y => y.Name.LocalName.Equals("r") && (y.FirstNode.ToString() == "<w:br xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\" />")).Remove();

        //Console.WriteLine(doc);

//To Removing w:r tag when only w:br found inside the w:r tag -- End

        foreach (XElement element in doc.Descendants().Where(x => x.Name.LocalName.Equals("rPr")))

        {           

            IEnumerable<XElement> elements = element.ElementsAfterSelf();  

            foreach (XElement el in elements)  

            {

                Console.WriteLine(el.Name);

            }                   

            break;

        }       

    }   

}