Freezable.CanFreeze Property

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

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

public bool CanFreeze { get; }
You cannot set this property in XAML.

Property Value

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

Notes to Inheritors:

This method implementation uses the FreezeCore method 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 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5, 3.0
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