private NumericUrlRangeModel(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
     : base(info, context)
 {
     this.range1 = info.GetInt32("range1");
     this.range2 = info.GetInt32("range2");
     this.zero   = info.GetUInt16("zero");
 }