Task<Result> PingAsync(
	CancellationToken cancellationToken = default
)Function PingAsync ( 
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Result)abstract PingAsync : 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<Result> [缺少 "M:TouchSocket.Http.WebSockets.IWebSocket.PingAsync(System.Threading.CancellationToken)" 的 <param name="cancellationToken"/> 文档]