System.Security.Permissions.SiteIdentityPermission.Intersect Method

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

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.

The intersection of two permissions is a permission that describes the sites they both describe in common. Only a demand that passes both original permissions will pass the intersection. For example, the intersection of a permission that represents access to www.fourthcoffee.com and one that represents access to *.fourthcoffee.com is a permission that represents access to www.fourthcoffee.com.

The intersection of two identical site identity permissions is the same permission. The intersection of two different (not wildcard) expressions is an empty permission. The intersection of a wildcard expression and a matching site is the site. The intersection of two wildcard expressions that match is the longer, more specific of the two expressions.