ReflectionPermission.Intersect(IPermission) Method

Definition

Namespace:

System.Security.Permissions

Assembly:

System.Security.Permissions.dll

Source:

ReflectionPermission.cs

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

C#

public override System.Security.IPermission Intersect(System.Security.IPermission target);

Parameters

target

IPermission

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

Returns

IPermission

A new permission that represents the intersection of the current permission and the specified permission. This new permission is null if the intersection is empty.

Exceptions

ArgumentException

The target parameter is not null and is not of the same type as the current permission.

Examples

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

Note

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.

C#

private static void IntersectDemo()
{
    ReflectionPermission memberAccessPerm = new ReflectionPermission(ReflectionPermissionFlag.MemberAccess);
    ReflectionPermission restrictedMemberAccessPerm = new ReflectionPermission(ReflectionPermissionFlag.RestrictedMemberAccess);
    ReflectionPermission reflectionPerm3 = (ReflectionPermission)memberAccessPerm.Intersect(restrictedMemberAccessPerm);
    if (reflectionPerm3 != null)
    {
        Console.WriteLine("The intersection of " + memberAccessPerm.Flags +
            " and " + restrictedMemberAccessPerm.Flags + " = " +
            ((ReflectionPermission)reflectionPerm3).Flags.ToString());
    }
    else
    {
        Console.WriteLine("The intersection of " + memberAccessPerm.Flags + " and " +
            restrictedMemberAccessPerm.Flags + " is null.");
    }
}

Remarks

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.

Applies to