◆ StreamWriter() [4/10]

System.IO.StreamWriter.StreamWriter	(	Stream	stream,
		Encoding?	encoding = null,
		int	bufferSize = -1,
		bool	leaveOpen = false )

inline

Definition at line 90 of file StreamWriter.cs.

        : base(null)
    {
        if (stream == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.stream);
        }
        if (encoding == null)
        {
            encoding = UTF8NoBOM;
        }
        if (!stream.CanWrite)
        {
            throw new ArgumentException(SR.Argument_StreamNotWritable);
        }
        if (bufferSize == -1)
        {
            bufferSize = 1024;
        }
        else if (bufferSize <= 0)
        {
            throw new ArgumentOutOfRangeException("bufferSize", SR.ArgumentOutOfRange_NeedPosNum);
        }
        _stream = stream;
        _encoding = encoding;
        _encoder = _encoding.GetEncoder();
        if (bufferSize < 128)
        {
            bufferSize = 128;
        }
        _charBuffer = new char[bufferSize];
        _charLen = bufferSize;
        if (_stream.CanSeek && _stream.Position > 0)
        {
            _haveWrittenPreamble = true;
        }
        _closable = !leaveOpen;
    }