public override int GetHashCode() { unchecked { var hashCode = C6H6.GetHashCode(); hashCode = (hashCode * 397) ^ PM10.GetHashCode(); hashCode = (hashCode * 397) ^ SO2.GetHashCode(); hashCode = (hashCode * 397) ^ NO2.GetHashCode(); hashCode = (hashCode * 397) ^ CO.GetHashCode(); hashCode = (hashCode * 397) ^ PM25.GetHashCode(); hashCode = (hashCode * 397) ^ O3.GetHashCode(); return(hashCode); } }