configs.cs

    /// 
    /// ConfigurationElement with additional Id property
    /// 
    public abstract class IdentifiableConfigurationElement : ConfigurationElement
    {
        public virtual string Id { get; }
    }

    /// 
    /// Generic ConfigurationElementCollection
    /// 
    public class ConfigurationElementCollection<T> : ConfigurationElementCollection where T : IdentifiableConfigurationElement, new()
    {
        public T this[int index]
        {
            get { return (T)BaseGet(index); }
            set
            {
                if (BaseGet(index) != null)
                {
                    BaseRemoveAt(index);
                }
                BaseAdd(index, value);
            }
        }

        public void Add(T serviceConfig)
        {
            BaseAdd(serviceConfig);
        }

        public void Clear()
        {
            BaseClear();
        }

        protected override ConfigurationElement CreateNewElement()
        {
            return new T();
        }

        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((T)element).Id;
        }

        public void Remove(T serviceConfig)
        {
            BaseRemove(serviceConfig.Id);
        }

        public void RemoveAt(int index)
        {
            BaseRemoveAt(index);
        }

        public void Remove(String name)
        {
            BaseRemove(name);
        }
    }