SchemeSettingElementCollection.cs

namespace System.Configuration
{
    [ConfigurationCollection(typeof(SchemeSettingElement), CollectionType = ConfigurationElementCollectionType.AddRemoveClearMap, AddItemName = "add", ClearItemsName = "clear", RemoveItemName = "remove")]
    public sealed class SchemeSettingElementCollection : ConfigurationElementCollection
    {
        internal const string AddItemName = "add";

        internal const string ClearItemsName = "clear";

        internal const string RemoveItemName = "remove";

        public override ConfigurationElementCollectionType CollectionType => ConfigurationElementCollectionType.AddRemoveClearMap;

        public SchemeSettingElement this[int index]
        {
            get
            {
                return (SchemeSettingElement)BaseGet(index);
            }
        }

        public new SchemeSettingElement this[string name]
        {
            get
            {
                return (SchemeSettingElement)BaseGet(name);
            }
        }

        public SchemeSettingElementCollection()
        {
            base.AddElementName = "add";
            base.ClearElementName = "clear";
            base.RemoveElementName = "remove";
        }

        public int IndexOf(SchemeSettingElement element)
        {
            return BaseIndexOf(element);
        }

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

        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((SchemeSettingElement)element).Name;
        }
    }
}