并非所有代码路径都返回值，为什么我的HAM短波无线电应用程序会出现这种情况

Question

因此，我正在用C#编写一个Windows控制台应用程序，用于短波HAM Radio DX爱好者在他们的桌面上查看数字电台和奇怪的广播时间。我使用Visual Studio社区版作为我的编译器。

发生的情况是编译器返回以下错误：

这个应用程序的工作原理是通过连接到priyom.orgs IRC频道，然后用户可以使用!n命令来查找下一个广播电台。但是我找不到没有返回的值：enter image description here

  [1]: https://i.stack.imgur.com/gguPR.png
Here is the code:

   
using System;
using System.IO;
using System.Net.Sockets;
using System.Threading.Tasks;

namespace irc_bot
{
    class Program
    {

        private const string server = "chat.freenode.net";
        private const string gecos = "Cerk";
        private const string nick = "Priyomwindowsapp";
        private const string ident = "Priyomwindowsapp";
        private const string channel = "#priyom";

        static string Main(string[] args)
        {
            using (var client = new TcpClient())
            {
                Console.WriteLine("Welcome to Numbers Station Finder. From here you can search for Number Station broadcast times and other shortwave / HAM radio oddities right from your Windows desktop. I will also present a link to navigate to in your web browser to listen in real time. For note, I use priyom.orgs IRC server. While on the IRC server you will have the nickname Priyomwindowsapp. To display the next signal to broadcast type !n. To search for a signal type !n space enigma ID (!n HM01 for example). Program C 2020 keifmeister.");

                Console.WriteLine($"Connecting to {server}");
                client.Connect(server, 6667);
                Console.WriteLine($"Connected: {client.Connected}");

                using (var stream = client.GetStream())
                using (var writer = new StreamWriter(stream))
                using (var reader = new StreamReader(stream))
                {
                    writer.WriteLine($"USER {ident} * 8 {gecos}");
                    writer.WriteLine($"NICK {nick}");
                    // identify with the server so your bot can be an op on the channel
                    writer.WriteLine($"PRIVMSG NickServ :IDENTIFY {nick}");
                    writer.Flush();

                    while (client.Connected)
                    {
                        var data = reader.ReadLine();

                        if (data != null)
                        {
                            var d = data.Split(' ');
                            Console.WriteLine($"Data: {data}");

                            if (d[0] == "PING")
                            {
                                writer.WriteLine("PONG");
                                writer.Flush();
                            }

                            if (d.Length > 1)
                            {

                                switch (d[1])
                                {
                                    case "376":
                                    case "422":
                                        {
                                            writer.WriteLine($"JOIN {channel}");

                                            // communicate with everyone on the channel as soon as the bot logs in
                                            Console.WriteLine("Enter username to be logged into:");
                                            string message = Convert.ToString(Console.ReadLine());
                                            writer.WriteLine(message);

                                            writer.Flush();
                                            break;
                                        }
                                    case "PRIVMSG":
                                        {
                                            if (d.Length > 2)
                                            {
                                                if (d[2] == nick)
                                                {
                                                    // someone sent a private message to the bot
                                                    var sender = data.Split('!')[0].Substring(1);
                                                    var message = data.Split(':')[2];
                                                    Console.WriteLine($"Message: {message}");
                                                    // handle all your bot logic here
                                                    writer.WriteLine($@"PRIVMSG {sender} : {message}");
                                                    writer.Flush();
                                                }

                                            }
                                            break;

                                        }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

任何帮助都是非常感谢的。

enter image description here

Answer 1

您将从Main返回一个string，因此静态分析认为您希望返回一个结果。很可能你实际上想要：

static void Main(string[] args)

其他资源

Main() and command-line arguments (C# Programming Guide)

任务Main可以具有void、int或从C# 7.1开始的

、Task或Task返回类型。

来自Hayden的有价值的评论

还确保您的项目输出类型是控制台应用程序(在Visual Studio中右键单击您的项目>属性>应用程序标签)。