PrincipalPermission.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 IPermission Intersect (
	IPermission target
)
public final IPermission Intersect (
	IPermission target
)
public final function Intersect (
	target : IPermission
) : IPermission

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 will be 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 an instance of the same class as the current permission.

Because two users never intersect, this method is not useful for PrincipalPermission. For example,

PrincipalPermission ppBob = new PrincipalPermission("Bob", "Administrator");
 PrincipalPermission ppLouise = new PrincipalPermission("Louise", "Administrator");
 PrincipalPermission pp1 = ppBob.Intersect(ppLouise);

is equivalent to

PrincipalPermission pp1 = new PrincipalPermission("", "Administrator");

because no identity can simultaneously represent both Bob and Louise. In effect, pp1.Demand() only succeeds if an unauthenticated principal (with name equal to the empty string ("")) is allowed to act in the Administrator role.

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0
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