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WebBrowserPermissionLevel Enumeration

Specifies the permission level for a Web browser.

Namespace:  System.Security.Permissions
Assembly:  WindowsBase (in WindowsBase.dll)
public enum WebBrowserPermissionLevel
<object property="enumerationMemberName" .../>
Member nameDescription
NoneA Web browser that cannot navigate frames to HTML.
SafeA Web browser that can safely navigate frames to HTML but with several restrictions.
UnrestrictedA Web browser that can navigate without restrictions.

Use this enumeration to set the Level property of the WebBrowserPermission class.

The Safe permission level restricts the following Web browser operations.

  • A pop-up window cannot be created over the Web browser control.

  • The Web browser control can only be navigated to its site of origin.

  • The security settings of the Web browser control are reduced.

The following example shows how to demand that the calling code has unrestricted permission to create a Web browser control.


[WebBrowserPermissionAttribute(SecurityAction.Demand, Level = WebBrowserPermissionLevel.Unrestricted)]


.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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