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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


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 null if the intersection is empty.




The target parameter is not null 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.


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 static 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());
        Console.WriteLine("The intersection of \n" + readPerm2.GetPathList(RegistryPermissionAccess.Read)
            + " \nand " + readPerm2.GetPathList(RegistryPermissionAccess.Read) + " is null. ");

    return returnValue;


Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

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