AWS SDK for .NET Documentation
AlarmName Property
AmazonAmazon.CloudWatch.ModelPutMetricAlarmRequestAlarmName Did this page help you?   Yes   No    Tell us about it...
The descriptive name for the alarm. This name must be unique within the user's AWS account

Constraints:

Length
1 - 255

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

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