System.Security.SecurityRuntime.Assert C# (CSharp) Method

        internal static void Assert(PermissionSet permSet, ref StackCrawlMark stackMark)
        {
            // Note: if the "AssertPermission" is not a permission that implements IUnrestrictedPermission
            // you need to change the fourth parameter to a zero.
            FrameSecurityDescriptor secObj = CodeAccessSecurityEngine.CheckNReturnSO(
                                                CodeAccessSecurityEngine.AssertPermissionToken,
                                                CodeAccessSecurityEngine.AssertPermission,
                                                ref stackMark,
                                                1,
                                                1 );
    
            BCLDebug.Assert(secObj != null || !SecurityManager._IsSecurityOn(),"Failure in SecurityRuntime.Assert() - secObj != null");
            if (secObj == null)
            {
                if (SecurityManager._IsSecurityOn())
                // Security: REQ_SQ flag is missing. Bad compiler ?
                throw new ExecutionEngineException( Environment.GetResourceString( "ExecutionEngine_MissingSecurityDescriptor" ) );
            }
            else
            {
                if (secObj.HasImperativeAsserts())
                    throw new SecurityException( Environment.GetResourceString( "Security_MustRevertOverride" ) );

                secObj.SetAssert(permSet);
            }
        }