Returns the object only if it has been modified since the specified time,
otherwise returns a PreconditionFailed.

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 GetObjectRequest WithUnmodifiedSinceDate( DateTime unmodifiedSinceDate )

- unmodifiedSinceDate (DateTime)
- The date and time to test

this instance

When this is set the S3 object is returned only if it has not been modified since the specified time, otherwise
return a 412 (precondition failed).