title: UploadPartCopy Amazon S3 API
body: <p>As per the Amazon documentation there is a API called <a href="https://docs.aws.amazon.com/AmazonS3/latest/API/API_UploadPartCopy.html" rel="nofollow noreferrer">UploadPartCopy</a> which copies an object from source bucket into a part of a destination object. But I cant find this API in <a href="https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/S3/TS3Client.html" rel="nofollow noreferrer">S3Client for .Net</a> interface. There is a UploadPart (for which I need to supply stream) but no UploadPartCopy. My usecase is that, I already have multiple objects in a source bucket and I want to form a destination bucket by combining all these objects into a single bucket. I want to do this without performing GetObject and then doing UploadPart as this involves a round trip.</p>
  <p>I cant seem to find this API in SDK. What am I missing?</p>