如何在.Net/C#中检测Websocket断开连接？

using System;
using System.Net.WebSockets;
using System.Threading;
using System.Threading.Tasks;

public class WebSocketClient
{
    private ClientWebSocket _webSocket;

    public async Task Connect(string url)
    {
        _webSocket = new ClientWebSocket();
        await _webSocket.ConnectAsync(new Uri(url), CancellationToken.None);
    }
}

public async Task ReceiveMessages()
{
    var buffer = new byte[1024];
    while (_webSocket.State == WebSocketState.Open)
    {
        var result = await _webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
        if (result.CloseStatus.HasValue && result.CloseStatus.Value == WebSocketCloseStatus.NormalClosure)
        {
            // 连接已断开
            break;
        }
        // 处理接收到的消息
        var message = Encoding.UTF8.GetString(buffer, 0, result.Count);
        Console.WriteLine(message);
    }
}

if (_webSocket.State == WebSocketState.Closed || _webSocket.State == WebSocketState.Aborted)
{
    // 连接已断开
}