AWS SDK for .NET Documentation
StateReasonData Property
AmazonAmazon.CloudWatch.ModelSetAlarmStateRequestStateReasonData Did this page help you?   Yes   No    Tell us about it...
The reason that this alarm is set to this specific state (in machine-readable JSON format)

Constraints:

Length
0 - 4000

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

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