System.Security.PermissionSetTriple.UpdateRefused C# (CSharp) Method

        internal void UpdateRefused(PermissionSet in_r)
        {
            if (in_r != null)
            {
                if (RefusedSet == null)
                    RefusedSet = in_r.Copy();
                else
                    RefusedSet.InplaceUnion(in_r);
            }
        } 

        [System.Security.SecurityCritical]  // auto-generated
        private void Update(PermissionSetTriple currentTriple, PermissionSet in_g, PermissionSet in_r)
        {
#if FEATURE_COMPRESSEDSTACK
            ZoneIdentityPermission z;
            UrlIdentityPermission  u;
            currentTriple.UpdateGrant(in_g, out z, out u);
            currentTriple.UpdateRefused(in_r);
            AppendZoneOrigin(z, u);
#else // !FEATURE_COMPRESEDSTACK
            currentTriple.UpdateGrant(in_g);
            currentTriple.UpdateRefused(in_r);
#endif // FEATURE_COMPRESSEDSTACK
        }