C# 0 The Complete Reference

Dictionary

 defines several methods. Some commonly used ones are shown in 

Table 24-16.

Method

Description

public void Add(TK 

k

, TV 

v

)

Adds the key/value pair specified by 

k

 and 

v

 to the 

dictionar y. If 

k

 is already in the dictionar y, then its 

value is unchanged and an 

ArgumentException

 is 

thrown.

public bool ContainsKey(TK 

k

)

Returns true if 

k

 is a key in the invoking dictionar y. 

Returns false other wise.

public bool ContainsValue(TV 

v

)

Returns true if 

v

 is a value in the invoking 

dictionar y. Returns false other wise.

public IDictionar y.Enumerator

    GetEnumerator( )

Returns an enumerator for the invoking dictionar y.

public bool Remove(TK 

k

)

Removes 

k

 from the dictionar y. Returns true 

if successful. Returns false if

k

 was not in the 

dictionar y.

T

ABLE

 24-16 

Several Commonly Used Methods Defi ned by 

Dictionary

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In addition to the properties defined by the interfaces that it implements,