C# websocketserver如何搭建

要搭建一个C# WebSocket 服务器，可以使用ASP.NET Core框架来实现。以下是一个简单的示例代码：

using System;using System.Net;using System.Net.WebSockets;using System.Text;using System.Threading;using System.Threading.Tasks;using Microsoft.AspNetCore.Builder;using Microsoft.AspNetCore.Hosting;using Microsoft.AspNetCore.Http;public class Startup{    public void Configure(IApplicationBuilder app)    {        app.UseWebSockets();        app.Use(async (context, next) =>        {            if (context.WebSockets.IsWebSocketRequest)            {                WebSocket webSocket = await context.WebSockets.AcceptWebSocketAsync();                await Echo(context, webSocket);            }            else            {                await next();            }        });    }    private async Task Echo(HttpContext context, WebSocket webSocket)    {        var buffer = new byte[1024];        WebSocketReceiveResult result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);        while (!result.CloseStatus.HasValue)        {            await webSocket.SendAsync(new ArraySegment<byte>(buffer, 0, result.Count), result.MessageType, result.EndOfMessage, CancellationToken.None);            result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);        }        await webSocket.CloseAsync(result.CloseStatus.Value, result.CloseStatusDescription, CancellationToken.None);    }}public class Program{    public static void Main(string[] args)    {        CreateWebHostBuilder(args).Build().Run();    }    public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>        WebHost.CreateDefaultBuilder(args)            .UseStartup<Startup>();}

在这个示例中，我们创建了一个ASP.NET Core的Startup类，配置了一个WebSocket中间件来处理WebSocket请求。在Echo方法中实现了一个简单的Echo服务器，收到客户端消息后直接将消息原样返回给客户端。

要运行这个WebSocket服务器，可以在项目文件夹下执行以下命令：

dotnet run

这将启动一个本地的WebSocket服务器，可以通过WebSocket客户端连接到它。