Light Custom Configuration Section

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;

namespace WebServiceClient {
  /*URLElement class below represents a bundle of properties (URL, password, etc) for each endpoint we need to send to... 

  And the following custom app.configuration section allows us to maintain a list of these URLElements. 
  copied from here: https://www.abhisheksur.com/2011/09/writing-custom-configurationsection-to.html 
  and here: https://stackoverflow.com/questions/1755421/c-sharp-appsettings-is-there-a-easy-way-to-put-a-collection-into-appsetting 
  The basic gist is 3 fairly light implementation classes -- 
  URLElement = individual elements, URLCollection = collection of elements, and URLSection = new custom app.config section. 
  */
  public class URLSection : ConfigurationSection {
    //nugget: it seems that the [ConfigurationProperty()] attribute does not work on a static property (maybe that's true for all attributes??), 
    //so the _URLs *instance* propery satisfies this attribute requirement, but made it private since don't plan on using it directly. 
    //then exposing the URLs collection as a public *static* property. 
    //this rigamarole merely allows for the slighty more succint "URLSection.URLs" from the calling code rather than "URLSection.urlSection.URLs" 
    public static URLCollection URLs { get { return _urlSection._URLs; } }

    [ConfigurationProperty ("URLs")]
    private URLCollection _URLs { get { return this ["URLs"] as URLCollection; } }
    private static readonly URLSection _urlSection = ConfigurationManager.GetSection ("URLSection") as URLSection;
  }

  //nugget: the xml tag name of the element level nodes must be "" by default 
  //to change to something else, it looks like one must implement a few more overrides like the ElementName & ConfigurationElementCollectionType properties. 
  //leaving it as the default seems just fine for current needs. 
  public class URLCollection : ConfigurationElementCollection {
    public URLElement this [int index] { get { return (URLElement) BaseGet (index); } }
    protected override ConfigurationElement CreateNewElement () { return new URLElement (); }
    protected override object GetElementKey (ConfigurationElement element) { return ((URLElement) (element)).Name; }
  }

  public class URLElement : ConfigurationElement {
    [ConfigurationProperty ("Name", IsKey = true, IsRequired = true)]
    public string Name {
      get { return (string) this ["Name"]; }
      set { this ["Name"] = value; }
    }

    [ConfigurationProperty ("Url", IsRequired = true)]
    public string Url {
      get { return (string) this ["Url"]; }
      set { this ["Url"] = value; }
    }

    [ConfigurationProperty ("ContextID", IsRequired = true)]
    public string ContextID {
      get { return (string) this ["ContextID"]; }
      set { this ["ContextID"] = value; }
    }

    [ConfigurationProperty ("Password", IsRequired = true)]
    public string Password {
      get { return (string) this ["Password"]; }
      set { this ["Password"] = value; }
    }

    [ConfigurationProperty ("IgnoreWebServiceException", DefaultValue = false)]
    public bool IgnoreWebServiceException {
      get { return (bool) this ["IgnoreWebServiceException"]; }
      set { this ["IgnoreWebServiceException"] = value; }
    }

  }

}