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Frame.SandboxExternalContent Property

Gets or sets whether a Frame isolates external Extensible Application Markup Language (XAML) content within a partial trust security sandbox (with default Internet zone permission set). This is a dependency property.

Namespace: System.Windows.Controls
Assembly: PresentationFramework (in presentationframework.dll)
XML Namespace:

Public Property SandboxExternalContent As Boolean
Dim instance As Frame
Dim value As Boolean

value = instance.SandboxExternalContent

instance.SandboxExternalContent = value
/** @property */
public boolean get_SandboxExternalContent ()

/** @property */
public void set_SandboxExternalContent (boolean value)

public function get SandboxExternalContent () : boolean

public function set SandboxExternalContent (value : boolean)

<object SandboxExternalContent="bool" .../>

Property Value

true if content is isolated within a partial trust security sandbox; otherwise, false. The default is false.

Identifier Field


Metadata Flags


Exception typeCondition


SandboxExternalContent is set when an application is executing in partial trust.

External content is XAML content that is not included with an application as either a resource file or a content file (see Windows Presentation Foundation Application Data Files).

When SandboxExternalContent is true, and the source for the content of the Frame is an external XAML file, the content is loaded into a partial trust security sandbox that is limited to the default Internet zone permission set. The external content is subsequently loaded into a separate process. As a result, the external content becomes isolated and does not have access to application-scope resources, such as resource dictionaries (see ResourceDictionary).


Frame will only contain external content when the Source property is set to the uniform resource identifier (URI) for an external XAML file. Frame content that is provided using the Content property is considered internal content and, subsequently, is not isolated.

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