Demand Method
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PrincipalPermission.Demand Method ()


Determines at run time whether the current principal matches the principal specified by the current permission.

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

public void Demand()

Exception Condition

The current principal does not pass the security check for the principal specified by the current permission.


The current IPrincipal is null.

If no SecurityException is raised, Demand succeeds.

This method acts against the principal attached to the calling thread.


Prior to calling the Demand method, it is necessary to set the current application domain's principal policy to the enumeration value WindowsPrincipal. By default the principal policy is set to UnauthenticatedPrincipal. If you do not set the principal policy to WindowsPrincipal, a demand for principal permission will fail. The following code should be executed before the demand for principal permission occurs:


.NET Framework
Available since 1.1
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