using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Xml;
    
    namespace ConsoleApplication1
    {
        class Program
        {
            static void Main(string[] args)
            {
                XmlDocument xmlDoc = new XmlDocument();
    
                xmlDoc.LoadXml(@"<Parts>
      <Part name=""DisappearsOk"" disabled=""true""></Part>
      <Part name=""KeepMe"" disabled=""false""></Part>
      <Part name=""KeepMe2"" ></Part>
      <Part name=""ShouldBeGone"" disabled=""true""></Part>  
    </Parts>");
    
                XmlNode root = xmlDoc.DocumentElement;
                List<XmlNode> disabledNodes = new List<XmlNode>();
    
                try
                {
    
                    foreach (XmlNode node in root.ChildNodes.Cast<XmlNode>()
                                                 .Where(child => child.Attributes["disabled"] != null &&
                                                                 Convert.ToBoolean(child.Attributes["disabled"].Value)))
                    {
                        Console.WriteLine("Removing:");
                        Console.WriteLine(node.OuterXml);
                        root.RemoveChild(node);
                    }
                }
                catch (Exception Ex)
                {
                    Console.WriteLine("Exception, as expected");
                }
    
                Console.WriteLine();
                Console.WriteLine(root.OuterXml);
    
                Console.ReadKey();
            }
        }
    }