AWS SDK for .NET Documentation
SignalName Property
AmazonAmazon.SimpleWorkflow.ModelSignalExternalWorkflowExecutionDecisionAttributesSignalName Did this page help you?   Yes   No    Tell us about it...
The name of the signal.The target workflow execution will use the signal name and input to process the signal. This field is required.

Constraints:

Length
1 - 256

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

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