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IStackWalk.Demand Method

Determines at run time whether all callers in the call stack have been granted the permission specified by the current permission object.

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

void Demand()

ExceptionCondition
SecurityException

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

-or-

A caller 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. Demand succeeds only if no SecurityException is raised.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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