This documentation is archived and is not being maintained.

RegistryPermission.Intersect Method

Creates and returns a permission that is the intersection of the current permission and the specified permission.

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

public override IPermission Intersect (
	IPermission target
)
public IPermission Intersect (
	IPermission target
)
public override function Intersect (
	target : IPermission
) : IPermission
Not applicable.

Parameters

target

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

Return Value

A new permission that represents the intersection of the current permission and the specified permission. This new permission is a null reference (Nothing in Visual Basic) if the intersection is empty.

Exception typeCondition

ArgumentException

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

The intersection of two permissions is a permission that describes the set of operations they both describe in common. Only a demand that passes both original permissions will pass the intersection.

The following code example shows the behavior of the Intersect 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.

// Intersect creates and returns a new permission that is the intersection of the
// current permission and the permission specified.
private bool IntersectDemo()
{

    bool returnValue = true;

    readPerm3 = (RegistryPermission)readPerm1.Intersect(readPerm2);
    if (readPerm3 != null && readPerm3.GetPathList(RegistryPermissionAccess.Read) != null)
    {

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

    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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