private async Task <string> CopyImageToDestinationContainerAsync(string photoUrl) { string permanentChannelImageUrl = null; if (!string.IsNullOrEmpty(photoUrl)) { var fileName = photoUrl.Substring(photoUrl.LastIndexOf("/", StringComparison.Ordinal) + 1); permanentChannelImageUrl = await _contentStorage.CopyBlobAsync(fileName, _configuration.TempContainerName, _configuration.ChannelImagesContainer); } return(permanentChannelImageUrl); }