Demand Method
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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()

Exception Condition

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


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
Available since 1.1
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