RegistryPermission.Union Method

Creates a permission that is the union of the current permission and the specified permission.

Namespace: System.Security.Permissions
Assembly: mscorlib (in mscorlib.dll)

public override IPermission Union (
	IPermission other
)
public IPermission Union (
	IPermission other
)
public override function Union (
	other : IPermission
) : IPermission
Not applicable.

Parameters

other

A permission to combine with the current permission. It must be of the same type as the current permission.

Return Value

A new permission that represents the union of the current permission and the specified permission.

Exception typeCondition

ArgumentException

The other parameter is not a null reference (Nothing in Visual Basic) and is not of the same type as the current permission.

The result of a call to Union is a permission that represents all the operations represented by both the current permission and the specified permission. Any demand that passes either permission passes their union.

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

NoteNote:

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.

// Union creates a new permission that is the union of the current permission and
// the specified permission.
private bool UnionDemo()
{

    bool returnValue = true;
    readPerm3 = (RegistryPermission)readPerm1.Union(readPerm2);

    if (readPerm3 == null)
    {
        Console.WriteLine("The union of \n" +
            readPerm1.GetPathList(RegistryPermissionAccess.Read) + " \nand "
            + readPerm2.GetPathList(RegistryPermissionAccess.Read) + " is null.");
    }
    else
    {
        Console.WriteLine("The union of \n" + readPerm1.GetPathList(RegistryPermissionAccess.Read) +
            " \nand " + readPerm2.GetPathList(RegistryPermissionAccess.Read) + " = \n\t"
            + ((RegistryPermission)readPerm3).GetPathList(RegistryPermissionAccess.Read).ToString());
    }

    return returnValue;

}

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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