AWS SDK for .NET Documentation
PartNumber Property
AmazonAmazon.S3.ModelCopyPartRequestPartNumber Did this page help you?   Yes   No    Tell us about it...
The number of the part to be copied.
Declaration Syntax
C#
public int PartNumber { get; set; }
Remarks
Valid part numbers are from 1 to 10,000 inclusive and will uniquely identify the part and determine the relative ordering within the destination object. If a part already exists with the PartNumber it will be overwritten.

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