[Modify] Polish it

This commit is contained in:
sta
2021-10-23 21:36:29 +09:00
parent 09050aff22
commit 044032690c

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@@ -733,6 +733,7 @@ namespace WebSocketSharp.Server
{
if (_websocket == null) {
var msg = "The session has not started yet.";
throw new InvalidOperationException (msg);
}