This documentation is archived and is not being maintained.

SmtpPermission.IsSubsetOf Method

Note: This method is new in the .NET Framework version 2.0.

Returns a value indicating whether the current permission is a subset of the specified permission.

Namespace: System.Net.Mail
Assembly: System (in system.dll)

public override bool IsSubsetOf (
	IPermission target
public boolean IsSubsetOf (
	IPermission target
public override function IsSubsetOf (
	target : IPermission
) : boolean



An IPermission that is to be tested for the subset relationship. This permission must be of the same type as the current permission.

Return Value

true if the current permission is a subset of the specified permission; otherwise, false.

Exception typeCondition


target is not an SmtpPermission.

The current permission is a subset of the specified permission if the current permission specifies a state that is wholly contained by the specified permission. If this method returns true, the current permission represents no more access to the protected resource than does the specified permission.

The following code example displays the subset relationship between two permissions.

public static bool CheckSubSet(SmtpPermission permission)
    SmtpPermission allAccess = new 
    return permission.IsSubsetOf(allAccess);

public static boolean CheckSubSet(SmtpPermission permission)
    SmtpPermission allAccess = new SmtpPermission(
    return permission.IsSubsetOf(allAccess);
} //CheckSubSet

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