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Freezable.CanFreeze Property

Gets a value that indicates whether this object can be made unmodifiable.

Namespace: System.Windows
Assembly: WindowsBase (in windowsbase.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public bool CanFreeze { get; }
/** @property */
public boolean get_CanFreeze ()

public function get CanFreeze () : boolean

You cannot use this property in XAML.

Property Value

true if the current object can be made unmodifiable or is already unmodifiable; otherwise, false.

Notes to Implementers: This method implementation uses FreezeCore with isChecking set to true to determine whether a Freezable can be made unmodifiable. To modify the way this property behaves in a derived class, override the FreezeCore method.

This example shows how to make a Freezable read-only by calling its Freeze method.

You cannot freeze a Freezable object if any one of the following conditions is true about the object:

  • It has animated or data bound properties.

  • It has properties that are set by a dynamic resource. For more information about dynamic resources, see the Resources Overview.

  • It contains Freezable sub-objects that cannot be frozen.

If these conditions are false for your Freezable object and you do not intend to modify it, consider freezing it to gain performance benefits.

The following example freezes a SolidColorBrush, which is a type of Freezable object.

Button myButton = new Button();
SolidColorBrush myBrush = new SolidColorBrush(Colors.Yellow);          

if (myBrush.CanFreeze)
{
    // Makes the brush unmodifiable.
    myBrush.Freeze();
}

myButton.Background = myBrush;  

For more information about Freezable objects, see the Freezable Objects Overview.

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
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