[Modify] Throw InvalidOperationException
[Modify] Throw InvalidOperationException

sta/websocket-sharp,2Toad/websocket-sharp,jogibear9988/websocket-sharp,2Toad/websocket-sharp,jogibear9988/websocket-sharp,2Toad/websocket-sharp,2Toad/websocket-sharp,jogibear9988/websocket-sharp,sta/websocket-sharp,jogibear9988/websocket-sharp,sta/websocket-sharp,sta/websocket-sharp