AWS SDK for .NET Documentation
Data Property
AmazonAmazon.Kinesis.ModelPutRecordRequestData Did this page help you?   Yes   No    Tell us about it...
The data blob to put into the record, which is Base64-encoded when the blob is serialized. The maximum size of the data blob (the payload after Base64-decoding) is 50 kilobytes (KB)

Constraints:

Length
0 - 51200

Declaration Syntax
C#
public MemoryStream Data { get; set; }

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