System.Xml.Serialization.XmlSerializationReader.GetNullAttr C# (CSharp) Method

        protected bool GetNullAttr()
        {
            string isNull = _r.GetAttribute(_nilID, _instanceNsID);
            if (isNull == null)
                isNull = _r.GetAttribute(_nullID, _instanceNsID);
            if (isNull == null)
            {
                isNull = _r.GetAttribute(_nullID, _instanceNs2000ID);
                if (isNull == null)
                    isNull = _r.GetAttribute(_nullID, _instanceNs1999ID);
            }
            if (isNull == null || !XmlConvert.ToBoolean(isNull)) return false;
            return true;
        }