[Modify] Polish it

This commit is contained in:
sta 2021-10-23 21:34:54 +09:00
parent f21d1f27aa
commit 09050aff22

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@ -659,6 +659,7 @@ namespace WebSocketSharp.Server
{
if (_websocket == null) {
var msg = "The session has not started yet.";
throw new InvalidOperationException (msg);
}