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Union Method

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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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