AWS SDK for .NET Documentation
NextPageToken Property
AmazonAmazon.SimpleWorkflow.ModelPollForDecisionTaskRequestNextPageToken Did this page help you?   Yes   No    Tell us about it...
If on a previous call to this method a NextPageToken was returned, the results are being paginated. To get the next page of results, repeat the call with the returned token and all other arguments unchanged.
Note:
The nextPageToken returned by this action cannot be used with GetWorkflowExecutionHistory to get the next page. You must call PollForDecisionTask again (with the nextPageToken) to retrieve the next page of history records. Calling PollForDecisionTask with a nextPageToken will not return a new decision task.
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Constraints:

Length
0 - 2048

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

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