AWS SDK for .NET Documentation
ScheduleToStartTimeout Property
AmazonAmazon.SimpleWorkflow.ModelScheduleActivityTaskDecisionAttributesScheduleToStartTimeout Did this page help you?   Yes   No    Tell us about it...
If set, specifies the maximum duration the activity task can wait to be assigned to a worker. This overrides the default schedule-to-start timeout specified when registering the activity type using RegisterActivityType. The valid values are integers greater than or equal to 0. An integer value can be used to specify the duration in seconds while NONE can be used to specify unlimited duration.
Note:
A schedule-to-start timeout for this activity task must be specified either as a default for the activity type or through this field. If neither this field is set nor a default schedule-to-start timeout was specified at registration time then a fault will be returned.

Constraints:

Length
0 - 8

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

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