AllowNullDictionaryTKey, TValueItem Property

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

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

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

abstract Item : 'TValue with get, set
override Item : 'TValue with get, set

Parameters

key  TKey

The key of the value to get or set. In this dictionary it can be even .

Return Value

Implements

In this dictionary both the key and the value can be .

If the key is not found when a value is being retrieved, KeyNotFoundException is thrown. If the key is not found when a value is being set, the key and value are added.

You can also use this property to add new elements by setting the value of a key that does not exist in the AllowNullDictionaryTKey, TValue, for example:

myDictionary[myNonexistentKey] = myValue;

Getting or setting this property approaches an O(1) operation.

Reference