MongoDB.GridFS.GridStream.Write C# (CSharp) Метод

        public override void Write(byte[] buffer, int offset, int count)
        {
            var nToWrite = 0;
              var bufOffset = offset;

              while (count > 0)
              {
            Seek(_position, SeekOrigin.Begin);
            nToWrite = Math.Min(count, _buffer.Capacity - (int)_buffer.Position);
            _buffer.Write(buffer, bufOffset, nToWrite);
            count -= nToWrite;
            bufOffset += nToWrite;
            _position += nToWrite;
            _fileInfo.Length = Math.Max(_position, _fileInfo.Length);
            Flush();
              }
        }