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ReflectionPermission.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 Overrides Function Intersect ( _
	target As IPermission _
) As IPermission


Type: System.Security.IPermission
A permission to intersect with the current permission. It must be of the same type as the current permission.

Return Value

Type: System.Security.IPermission
A new permission that represents the intersection of the current permission and the specified permission. This new permission is Nothing if the intersection is empty.




The target parameter is not Nothing 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 example is part of a larger example provided for the ReflectionPermission class.


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.

    Private Shared Sub IntersectDemo()
        Dim memberAccessPerm As New ReflectionPermission(ReflectionPermissionFlag.MemberAccess)
        Dim restrictedMemberAccessPerm As New ReflectionPermission(ReflectionPermissionFlag.RestrictedMemberAccess)
        Dim reflectionPerm3 As ReflectionPermission = CType(memberAccessPerm.Intersect(restrictedMemberAccessPerm), ReflectionPermission)
        If Not (reflectionPerm3 Is Nothing) Then
            Console.WriteLine("The intersection of " + memberAccessPerm.Flags.ToString() + _
            " and " + restrictedMemberAccessPerm.Flags.ToString() + " = " + _
            CType(reflectionPerm3, ReflectionPermission).Flags.ToString())
            Console.WriteLine("The intersection of " + memberAccessPerm.Flags.ToString + " and " + _
                restrictedMemberAccessPerm.Flags.ToString() + " is null.")
        End If

    End Sub 'IntersectDemo

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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