Sets the IsFrozen state to
true on the containing Freezable element. Default behavior for a Freezable without the
PresentationOptions:Freeze attribute specified is that IsFrozen is
false at load time, and dependent on general Freezable behavior at runtime.
XAML Attribute Usage
<object xmlns:PresentationOptions="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="PresentationOptions"> <freezableElement PresentationOptions:Freeze="true"/> </object>
||An XML namespace prefix, which can be any valid prefix string, per the XML 1.0 specification. The prefix
||An element that instantiates any derived class of Freezable.|
Freeze attribute is the only attribute or other programming element defined in the
http://schemas.microsoft.com/winfx/2006/xaml/presentation/options XML namespace. The
Freeze attribute exists in this special namespace specifically so that it can be designated as ignorable, using mc:Ignorable Attribute as part of the root element declarations. The reason that
Freeze must be able to be ignorable is because not all XAML processor implementations are able to freeze a Freezable at load time; this capability is not part of the XAML specification.
The ability to process the
Freeze attribute is specifically built in to the XAML processor that processes XAML for compiled applications. The attribute is not supported by any class, and the attribute syntax is not extensible or modifiable. If you are implementing your own XAML processor you can choose to parallel the freezing behavior of the WPF XAML processor when processing the
Freeze attribute on Freezable elements at load time.
Any value for the
Freeze attribute other than
true (not case sensitive) generates a load time error. (Specifying the
Freeze attribute as
false is not an error, but that is already the default, so setting to
false does nothing).