Sets an ETag that must not be matched as a pre-condition for copying the source object,
            otherwise returns a PreconditionFailed.
            
 Declaration Syntax
 Declaration Syntax| C# | 
[ObsoleteAttribute("The With methods are obsolete and will be removed in version 2 of the AWS SDK for .NET. See http://aws.amazon.com/sdkfornet/#version2 for more information.")] public CopyObjectRequest WithETagToNotMatch( string etagToNotMatch )
 Parameters
 Parameters- etagToNotMatch (String)
- The value that ETagToNotMatch is set to
 Return Value
 Return Valuethis instance
 Remarks
 Remarks
            Copies the object if its entity tag (ETag) is different
            than the specified Etag; otherwise returns a 412 (failed condition).
            Constraints: This header can be used with IfModifiedSince, but cannot
            be used with other conditional copy properties.