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CodeAccessPermission.Demand Method

Forces a SecurityException at run time if all callers higher in the call stack have not been granted the permission specified by the current instance.

Namespace:  System.Security
Assembly:  mscorlib (in mscorlib.dll)

public final function Demand()

Implements

IPermission.Demand()
IStackWalk.Demand()

ExceptionCondition
SecurityException

A caller higher in the call stack does not have the permission specified by the current instance.

-or-

A caller higher in the call stack has called Deny on the current permission object.

This method is typically used by secure libraries to ensure that callers have permission to access a resource. For example, a file class in a secure class library calls Demand for the necessary FileIOPermission before performing a file operation requested by the caller.

The permissions of the code that calls this method are not examined; the check begins from the immediate caller of that code and proceeds up the stack. The call stack is typically represented as growing down, so that methods higher in the call stack call methods lower in the call stack. Demand succeeds only if no SecurityException is raised.

Notes to Inheritors:

You cannot override this method.

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

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