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UIPermission.FromXml Method

Reconstructs a permission with a specified state from an XML encoding.

Namespace:  System.Security.Permissions
Assembly:  mscorlib (in mscorlib.dll)
public override void FromXml(
	SecurityElement esd


Type: System.Security.SecurityElement

The XML encoding used to reconstruct the permission.



The esd parameter is null.


The esd parameter is not a valid permission element.


The esd parameter's version number is not valid.

The following code example shows the behavior of the FromXml method. This example is part of a larger example provided for the UIPermission class.


The code example is intended to show the behavior of the method, not to demonstrate its use. In general, the methods of permission classes are used by the security infrastructure; they are not typically used in applications.

// ToXml creates an XML encoding of the permission and its current state; FromXml reconstructs a 
// permission with the specified state from the XML encoding. 
private static void ToFromXmlDemo()

    UIPermission uiPerm1 = new UIPermission(UIPermissionWindow.SafeTopLevelWindows);
    UIPermission uiPerm2 = new UIPermission(PermissionState.None);
    bool result = uiPerm2.Equals(uiPerm1);
    if (result)
        Console.WriteLine("Result of ToFromXml = " + uiPerm2.ToString());


.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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