AWS SDK for .NET Documentation
HistoryData Property
AmazonAmazon.CloudWatch.ModelAlarmHistoryItemHistoryData Did this page help you?   Yes   No    Tell us about it...
Machine-readable data about the alarm in JSON format.

Constraints:

Length
1 - 4095

Declaration Syntax
C#
public string HistoryData { get; set; }

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)