Returns a collection of all of the values in the dictionary associated with key, or changes the set of values associated with key. If the key is not present in the dictionary, an ICollection enumerating no values is returned. The returned collection of values is read-write, and can be used to modify the collection of values associated with the key.

public virtual ICollection<TValue> this[
	TKey key
] { get; set; }

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