Pilz/Pilz.Configuration/ConfigurationManagerList.cs

using System.Collections;
using System.Collections.Generic;
using Pilz.GeneralEventArgs;

namespace Pilz.Configuration
{
    public class ConfigurationManagerList : IList<ConfigurationManager>
    {
        public event GettingParentManagerEventHandler GettingParentManager;

        public delegate void GettingParentManagerEventHandler(object sender, GetValueEventArgs<SimpleConfiguration> e);

        private readonly List<ConfigurationManager> myList = new List<ConfigurationManager>();

        private object GetParentManager()
        {
            var args = new GetValueEventArgs<SimpleConfiguration>();
            GettingParentManager?.Invoke(this, args);
            return args.Value;
        }

        public ConfigurationManager this[int index]
        {
            get => myList[index];
            set => myList[index] = value;
        }

        public int Count => myList.Count;

        public bool IsReadOnly => false;

        public void Insert(int index, ConfigurationManager item)
        {
            myList.Insert(index, item);
            item.SetConfiguration((SimpleConfiguration)GetParentManager());
        }

        public void RemoveAt(int index)
        {

        }

        public void Add(ConfigurationManager item)
        {
            item.SetConfiguration((SimpleConfiguration)GetParentManager());
        }

        public void Clear()
        {
            foreach (ConfigurationManager item in myList)
                item.SetConfiguration(null);
            myList.Clear();
        }

        public void CopyTo(ConfigurationManager[] array, int arrayIndex)
        {
            myList.CopyTo(array, arrayIndex);
        }

        public int IndexOf(ConfigurationManager item)
        {
            return myList.IndexOf(item);
        }

        public bool Contains(ConfigurationManager item)
        {
            return myList.Contains(item);
        }

        public bool Remove(ConfigurationManager item)
        {
            item.SetConfiguration(null);
            return myList.Remove(item);
        }

        public IEnumerator<ConfigurationManager> GetEnumerator()
        {
            return (IEnumerator<ConfigurationManager>)IEnumerable_GetEnumerator();
        }

        private IEnumerator IEnumerable_GetEnumerator()
        {
            return myList.GetEnumerator();
        }

        IEnumerator IEnumerable.GetEnumerator() => IEnumerable_GetEnumerator();
    }
}