AWS SDK for .NET Documentation
RunId Property
AmazonAmazon.SimpleWorkflow.ModelWorkflowExecutionRunId Did this page help you?   Yes   No    Tell us about it...
A system generated unique identifier for the workflow execution.

Constraints:

Length
1 - 64

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

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