SerializableObjectItem - свойство

public Object this[
	string key
] { get; set; }

Public Default Property Item ( 
	key As String
) As Object
	Get
	Set

public:
virtual property Object^ default[String^ key] {
	Object^ get (String^ key) sealed;
	void set (String^ key, Object^ value) sealed;
}

abstract Item : Object with get, set
override Item : Object with get, set