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WebPermission.Union Method

Returns the logical union between two instances of the WebPermission class.

Namespace:  System.Net
Assembly:  System (in System.dll)
public override IPermission Union(
	IPermission target
)

Parameters

target
Type: System.Security.IPermission
The WebPermission to combine with the current WebPermission.

Return Value

Type: System.Security.IPermission
A WebPermission that represents the union of the current instance and the target parameter. If either WebPermission is Unrestricted, the method returns a WebPermission that is Unrestricted. If the target is null, the method returns a copy of the current WebPermission.

Implements

IPermission.Union(IPermission)
ExceptionCondition
ArgumentException

target is not null or of type WebPermission.

Union returns a WebPermission that contains all the permissions in both target and the current instance.

The following example takes the logical union of two WebPermission instances to create a third instance of WebPermission.



    // Create another WebPermission that is the Union of previous two WebPermission 
    // instances.
    WebPermission myWebPermission3 =(WebPermission) myWebPermission1.Union(myWebPermission2);
    Console.WriteLine("\nAttributes and values of the WebPermission after the Union are : ");
    // Display the attributes,values and children.
    Console.WriteLine(myWebPermission3.ToXml().ToString());



.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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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