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PropertyMetadata.PropertyMetadata(Object) Constructor

Initializes a new instance of the PropertyMetadata class with a specified default value for the dependency property that this metadata will be applied to.

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

public PropertyMetadata (
	Object defaultValue
public PropertyMetadata (
	Object defaultValue
public function PropertyMetadata (
	defaultValue : Object
You cannot use constructors in XAML.



The default value to specify for a dependency property, usually provided as a value of some specific type.

Exception typeCondition


defaultValue cannot be set to the value UnsetValue; see Remarks.

The type of the value provided for defaultValue must be match or be related to the type specified in the original registration of the dependency property that this metadata will be applied to. Mismatches between metadata default value type and the type of the dependency property it is being applied to can be difficult to debug, because the mismatch is not detectable during compilation (the mismatch will raise a run-time exception).

Although it is the default per the parameterless constructor, a defaultValue of UnsetValue cannot be specified. Attempting to do so will raise an exception.

static PropertyMetadata pm;


  pm = new PropertyMetadata(Double.NaN);

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0