private static void DownloadFile(CrmServiceClient svc, string *interestingly enough we didn't get any error while trying to download files with size entityName, Guid recordGuid, 
            string fileAttributeName, string filePath)
        {
            var initializeFileBlocksDownloadRequest = new InitializeFileBlocksDownloadRequest
            {
                Target = new EntityReference(entityName, recordGuid),
                FileAttributeName = fileAttributeName
            };

            var initializeFileBlocksDownloadResponse = (InitializeFileBlocksDownloadResponse)
                svc.Execute(initializeFileBlocksDownloadRequest);

            DownloadBlockRequest downloadBlockRequest = new DownloadBlockRequest
            {
                FileContinuationToken = initializeFileBlocksDownloadResponse.FileContinuationToken
            };

            var downloadBlockResponse = (DownloadBlockResponse)svc.Execute(downloadBlockRequest);

            // Creates a new file, writes the specified byte array to the file,
            // and then closes the file. If the target file already exists, it is overwritten.

            File.WriteAllBytes(filePath + 
                initializeFileBlocksDownloadResponse.FileName, 
                downloadBlockResponse.Data);

        }