[This is preliminary documentation and is subject to change.]

Determines whether the IDictionary<(Of <(<'TKey, TValue>)>)> contains an element with the specified key.

Namespace: Tools.CollectionsT.GenericT
Assembly: Tools (in Tools.dll) Version: 1.5.3.38916 (1.5.3.38916)

Syntax

C#
public bool ContainsKey( TKey key )

Visual Basic
Public Function ContainsKey ( _ key As TKey _ ) As Boolean

Visual C++
public: virtual bool ContainsKey( TKey key ) sealed

F#
abstract ContainsKey : key:'TKey -> bool override ContainsKey : key:'TKey -> bool

JScript
public final function ContainsKey( key : TKey ) : boolean

key: Type: TKey
The key to locate in the IDictionary<(Of <(<'TKey, TValue>)>)>.

true if the IDictionary<(Of <(<'TKey, TValue>)>)> contains an element with the key; otherwise, false.

Exceptions

Exception	Condition
System..::..ArgumentNullException	key is null.