AppendBlobAppendBlockOptions
Optional parameters for appending a block with
             AppendBlockAsync.
            
                using System;
namespace Azure.Storage.Blobs.Models
{
    public class AppendBlobAppendBlockOptions
    {
        public AppendBlobRequestConditions Conditions { get; set; }
        public IProgress<long> ProgressHandler { get; set; }
        public UploadTransferValidationOptions TransferValidation { get; set; }
    }
}