This documentation is archived and is not being maintained.

NameScope.ContainsKey Method

Returns whether a provided name already exists in this NameScope.

Namespace:  System.Windows
Assembly:  WindowsBase (in WindowsBase.dll)

public bool ContainsKey(
	string key


Type: System.String
The string key to find.

Return Value

Type: System.Boolean
true if the specified key identifies a name for an existing mapping in this NameScope. false if the specified key does not exist in the current NameScope.


IDictionary<TKey, TValue>.ContainsKey(TKey)


key is null.

Names in a XAML namescope must use a particular grammar that restricts the strings you might use for inputs of NameScope API. See XamlName Grammar.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.