System.Net.DnsPermission.FromXml C# (CSharp) Метод

        public override void FromXml(SecurityElement securityElement) {

            if (securityElement == null)
            {
                //
                // null SecurityElement
                //

                throw new ArgumentNullException("securityElement");
            }

            if (!securityElement.Tag.Equals("IPermission"))
            {
                //
                // SecurityElement must be a permission element
                //

                throw new ArgumentException(SR.GetString(SR.net_no_classname), "securityElement");
            }

            string className = securityElement.Attribute( "class" );

            if (className == null)
            {
                //
                // SecurityElement must be a permission element for this type
                //

                throw new ArgumentException(SR.GetString(SR.net_no_classname), "securityElement");
            }


            if (className.IndexOf( this.GetType().FullName ) < 0)
            {
                //
                // SecurityElement must be a permission element for this type
                //

                throw new ArgumentException(SR.GetString(SR.net_no_typename), "securityElement");
            }

            string str = securityElement.Attribute( "Unrestricted" );
            m_noRestriction = (str!=null?(0 == string.Compare( str, "true", StringComparison.OrdinalIgnoreCase)):false);
        }

		public void FromXml_WrongVersion ()
		{
			DnsPermission dp = new DnsPermission (PermissionState.None);
			SecurityElement se = dp.ToXml ();
			se.Attributes.Remove ("version");
			se.Attributes.Add ("version", "2");
			dp.FromXml (se);
		}