System.Data.SqlTypes.SqlBytes.Read C# (CSharp) Метод

        public long Read(long offset, byte[] buffer, int offsetInBuffer, int count)
        {
            if (IsNull)
                throw new SqlNullValueException();

            // Validate the arguments
            if (buffer == null)
                throw new ArgumentNullException(nameof(buffer));

            if (offset > Length || offset < 0)
                throw new ArgumentOutOfRangeException(nameof(offset));

            if (offsetInBuffer > buffer.Length || offsetInBuffer < 0)
                throw new ArgumentOutOfRangeException(nameof(offsetInBuffer));

            if (count < 0 || count > buffer.Length - offsetInBuffer)
                throw new ArgumentOutOfRangeException(nameof(count));

            // Adjust count based on data length
            if (count > Length - offset)
                count = (int)(Length - offset);

            if (count != 0)
            {
                switch (_state)
                {
                    case SqlBytesCharsState.Stream:
                        if (_stream.Position != offset)
                            _stream.Seek(offset, SeekOrigin.Begin);
                        _stream.Read(buffer, offsetInBuffer, count);
                        break;

                    default:
                        Array.Copy(_rgbBuf, offset, buffer, offsetInBuffer, count);
                        break;
                }
            }
            return count;
        }

        // The Read/Write/ReadByte/WriteByte simply delegates to SqlBytes
        public override int Read(byte[] buffer, int offset, int count)
        {
            CheckIfStreamClosed("Read");

            if (buffer == null)
            {
                throw new ArgumentNullException("buffer");
            }
            if (offset < 0 || offset > buffer.Length)
            {
                throw new ArgumentOutOfRangeException("offset");
            }
            if (count < 0 || count > buffer.Length - offset)
            {
                throw new ArgumentOutOfRangeException("count");
            }

            int iBytesRead = (int)m_sb.Read(m_lPosition, buffer, offset, count);

            m_lPosition += iBytesRead;

            return(iBytesRead);
        }