AWS SDK for .NET Documentation
CopyToLocal Method (path, changesSince)
AmazonAmazon.S3.IOS3DirectoryInfoCopyToLocal(String, DateTime) Did this page help you?   Yes   No    Tell us about it...
Copies the files from the S3 directory to the local file system in the location indicated by the path parameter. Only files that have been modified since the changesSince property will be copied.
Declaration Syntax
C#
public DirectoryInfo CopyToLocal(
	string path,
	DateTime changesSince
)
Parameters
path (String)
The location on the local file system to copy the files to.
changesSince (DateTime)
Date which files must have changed since in ordered to be copied.
Return Value
DirectoryInfo for the local directory where files are copied to.
Exceptions

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