private static long GetChunk(int countIteration, FilesFinalizeMppResponse file)
        {
            long chunk;

            if (file.Size < file.ChunkSize)
            {
                chunk = file.Size;
            }
            else
            {
                chunk = file.ChunkSize * countIteration;
                if (file.Size - chunk < 0)
                {
                    chunk = file.Size - file.ChunkSize * (countIteration - 1);
                }
            }

            return(chunk);
        }
 private static int GetCountChunks(FilesFinalizeMppResponse file) => Convert.ToInt32(file.Size / file.ChunkSize + file.Size % file.ChunkSize);