AppendBlobAppendBlockFromUriOptions
Optional parameters for
             AppendBlockFromUriAsync.
            
                
Optional  AppendBlobRequestConditions to add
            conditions on the copying of data to this append blob.
            
Optional.  Source authentication used to access the source blob.
            
Optional  AppendBlobRequestConditions to add
            conditions on the copying of data from this source blob.
            
Optional MD5 hash of the append block content from the
            sourceUri.  This hash is used to verify the
            integrity of the block during transport of the data from the Uri.
            When this hash is specified, the storage service compares the hash
            of the content that has arrived from the sourceUri
            with this value.  Note that this md5 hash is not stored with the
            blob.  If the two hashes do not match, the operation will fail
            with a  RequestFailedException.
            
Optionally only upload the bytes of the blob in the
            sourceUri in the specified range.  If this is
            not specified, the entire source blob contents are uploaded as a
            single append block.
            
public AppendBlobAppendBlockFromUriOptions()