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 IStackWalk.Demand for the necessary System.Security.Permissions.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. IStackWalk.Demand succeeds only if no System.Security.SecurityException is raised.

Namespace: System.Security
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0