public void AddQualityCondition(XmlQualityCondition xmlQualityCondition)
        {
            if (QualityConditions == null)
            {
                QualityConditions = new List <XmlQualityCondition>();
            }

            QualityConditions.Add(xmlQualityCondition);
        }
        public void AddQualityCondition([NotNull] XmlQualityCondition xmlQualityCondition)
        {
            Assert.ArgumentNotNull(xmlQualityCondition, nameof(xmlQualityCondition));

            if (QualityConditions == null)
            {
                QualityConditions = new List <XmlQualityCondition>();
            }

            QualityConditions.Add(xmlQualityCondition);
        }