SandboxExternalContent Property

Frame.SandboxExternalContent Property


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

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

public bool SandboxExternalContent { get; set; }

Property Value

Type: System.Boolean

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

Exception Condition

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 WPF Application Resource, Content, and 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 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.

Identifier field


Metadata properties set to true


.NET Framework
Available since 3.0
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