AppendBlobAppendBlockOptions
Optional parameters for appending a block with
             AppendBlockAsync.
            
                
Optional  AppendBlobRequestConditions to add
            conditions on the upload of this Append Blob.
            
Optional  IProgress<T> to provide
            progress updates about data transfers.
            
Optional override settings for this client's  TransferValidation settings.
            
             AppendBlock accepts precalcualted checksums, but the method will calculate
             one if not provided.
             
public AppendBlobAppendBlockOptions()