private async Task StartCopyFromUri(long taskId, IStorageBlobManagement destChannel, Uri srcUri, CloudPageBlob destBlob)
{
//Don't need to verify the Dest Exist and warn user for overwrite, since incremental Copy won't overwrite the dest blob, but will create a new snapshot for it.
string copyId = await destChannel.StartIncrementalCopyAsync(destBlob, new CloudPageBlob(srcUri), null, this.RequestOptions, this.OperationContext, this.CmdletCancellationToken).ConfigureAwait(false);
this.OutputStream.WriteVerbose(taskId, String.Format(Resources.CopyDestinationBlobPending, destBlob.Name, destBlob.Container.Name, copyId));
this.WriteCloudBlobObject(taskId, destChannel, destBlob);
}