升级Blazor项目到Net Core 6时，需要更新Microsoft.AspNetCore.SignalR.Client包以支持SignalR的最新版本。这也会影响到使用Websocket的SignalR客户端。如果不进行更新可能会导致Websocket失效。 以下是更新包和在Blazor中使用SignalR的示例代码：

1.通过NuGet在项目中安装Microsoft.AspNetCore.SignalR.Client的最新版本 2.在Startup.cs的ConfigureServices方法中添加以下代码：

services.AddSignalR(e => {
    e.Transports = HttpTransportType.WebSockets;
});

3.在Blazor组件中使用SignalR，示例代码如下：

@page "/"
@using Microsoft.AspNetCore.SignalR.Client
@inject NavigationManager UrlNavigationManager


    

        
SignalR Chat
    



    

        

            User:
            
        
        

            Message:
            
        
        

            Send
        
    
    

        

            @foreach (var msg in messages)
            {
                
@msg
            }
        
    


@code {
    private HubConnection _hubConnection;
    private List messages = new();
    private string message = "";
    private string username = "";

    protected override async Task OnInitializedAsync()
    {
        var baseUrl = UrlNavigationManager.BaseUri;
        _hubConnection = new HubConnectionBuilder()
            .WithUrl($"{baseUrl}chatHub")
            .Build();

        _hubConnection.On("ReceiveMessage", (user, message) =>
        {
            var encodedMsg