It is recommended to add MaxSegmentSize to Socket.SetSocketOption

[zhh0000zhh]

Due to special needs, I need to manually set MSS. Currently, it can only be called through P/Invoke. I hope it can be natively supported.

` socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.MaxSegmentSize, mssValue);

Or provide the ability to directly call the underlying setoption. At present, it only needs to allow optionname to be input as int and add optlen. Although the definition of optlen is different in different operating systems (windows is int, linux/unix is ​​uint), since optlen generally does not exceed int.max, such differences can be ignored.

` public void SetSocketOption(int optionLevel, int optionName, intptr optionValue, int optlen);

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[MihaZupan]

Are you looking for void SetRawSocketOption(int optionLevel, int optionName, ReadOnlySpan<byte> optionValue)?

[antonfirsov]

Actually, this socket option is supported on both Windows and Linux, probably also on Mac, so we can theoretically add out-of-the-box support.

@zhh0000zhh would you be interested to edit the issue so it more or less matches the formal API proposal template? Example: #71207

[wfurt]

I would be supportive to add API. That should be small. The option @MihaZupan suggested may be good short term option and at least avoids interop code.