IWebSocketReadAsync 方法
            异步等待读取数据
            
命名空间: TouchSocket.Http.WebSockets程序集: TouchSocket.Http (在 TouchSocket.Http.dll 中) 版本:4.0.0-beta.143+5fcca7a4e70968794985dc3793adc50531308be6
ValueTask<IWebSocketReceiveResult> ReadAsync(
	CancellationToken cancellationToken
)
Function ReadAsync ( 
	cancellationToken As CancellationToken
) As ValueTask(Of IWebSocketReceiveResult)
abstract ReadAsync : 
        cancellationToken : CancellationToken -> ValueTask<IWebSocketReceiveResult> 
- cancellationToken  CancellationToken
 - 用于取消异步读取操作的取消令牌
 
ValueTaskIWebSocketReceiveResult返回一个值任务,该任务完成后将包含WebSocket接收的结果