System.Configuration.ConfigurationPropertyCollection.this C# (CSharp) Method

        public ConfigurationProperty this[String name] {
            get {
                for (int index = 0; index < _items.Count; index++) {
                    ConfigurationProperty cp = (ConfigurationProperty)_items[index];
                    if (cp.Name == name) {
                        return (ConfigurationProperty)_items[index];
                    }
                }
                return (ConfigurationProperty)null;
            }
        }