AWS SDK for .NET Documentation
ETagToMatch Property
AmazonAmazon.S3.ModelCopyPartRequestETagToMatch Did this page help you?   Yes   No    Tell us about it...
Collection of ETags to be matched as a pre-condition for copying the source object otherwise returns a PreconditionFailed.
Declaration Syntax
C#
public List<string> ETagToMatch { get; set; }
Remarks
Copies the object if its entity tag (ETag) matches one of the specified tags; otherwise return a 412 (precondition failed). Constraints: This property can be used with IfUnmodifiedSince, but cannot be used with other conditional copy properties.

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