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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)

'Declaration
Public Overrides Function Union ( _
	target As IPermission _
) As IPermission

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 Nothing, the method returns a copy of the current WebPermission.

Implements

IPermission.Union(IPermission)

ExceptionCondition
ArgumentException

target is not Nothing 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. 
   Dim myWebPermission3 As WebPermission = CType(myWebPermission1.Union(myWebPermission2), WebPermission)
   Console.WriteLine(ControlChars.Cr + "Attributes and values of the WebPermission after the Union are : ")
   ' Display the attributes,values and children.
   Console.WriteLine(myWebPermission3.ToXml().ToString())
End Sub 'CreateUnion
 

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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