using System;
using System.Text;
using System.Linq;
using System.Xml.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass
{
public static void Main()
{
StringBuilder output = new StringBuilder();
XElement xmlTree1 = new XElement("Root",
new XElement("Child1", 1),
new XElement("Child5", 5),
new XElement("Child6", 6)
);
XElement xmlTree2 = new XElement("Root",
from el in xmlTree1.Elements()
where ((int)el >= 3 && (int)el <= 5)
select el
);
output.Append(xmlTree2);
Console.WriteLine(output.ToString());
}
}