Remove elements from a XML file

private static XDocument GetFilteredData(XDocument resultXML)

{

 //Remove elements of xpath item/title
 //that doesn't contains the title value as 'genome'

 resultXML.Descendants("item").Descendants("title").Where(x => !(x.Value.ToLower().Contains("genome"))).Select(tit => tit.Parent).Remove();

 return resultXML;

}

Merge XML files as one

private static XDocument MergeXMLDocs()

{

 XDocument resultXML = new XDocument();

 resultXML = XDocument.Load("RSSLink(XML data)");

 IEnumerable<XElement> newElements = XDocument.Load("New RSS Link(XML data)").Root.Elements();

 resultXML.Root.Add(newElements);

 return resultXML;

}

Add List Item in SharePoint

SPSecurity.RunWithElevatedPrivileges(delegate()

{

 using (SPSite site = new SPSite("http://mySite:4444/site1"))

 {

  using (SPWeb web = site.OpenWeb())

  {

   web.AllowUnsafeUpdates = true;

   SPList list = web.Lists.TryGetList("Tasks");

   if (list != null)

   {

    //Creates the structure

    SPListItem newListItem = list.Items.Add();

    //Check whether the column is in sharepoint list.

    if(newListItem.Fields.ContainsField("Title"))

     newListItem["Title"] = "Aditya";

    
    if (newListItem.Fields.ContainsField("Last Name"))

     newListItem["Last Name"] = "Reddy";

    if (newListItem.Fields.ContainsField("Employee ID"))

     newListItem["Employee ID"] = "34";

    //Updates the changes in content database

    newListItem.Update();

   }

  web.AllowUnsafeUpdates = false;

  }

 }

});