Gets or sets the value for the specified key. Get Method, if the key is found then the associated value will be returned, else DefaultValue is returned. Set Method, if the key is found then associated value is replaced with the specified value, else Add method will be called to add key and value.

public TValue this[
	TKey key
] { get; set; }

Public Default Property Item ( 
	key As TKey
) As TValue
	Get
	Set

public:
property TValue default[TKey key] {
	TValue get (TKey key);
	void set (TKey key, TValue value);
}

member Item : 'TValue with get, set