实现下载列表中版本的功能

Program.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Threading.Tasks;
+using MCSJ.Tools;
+
+namespace MCSJ
+{
+    class Program
+    {
+        static async Task Main(string[] args)
+        {
+            var versionManager = new VersionManager();
+            var downloadService = new DownloadService(versionManager);
+            
+            while (true)
+            {
+                Console.WriteLine("MC服务器下载工具");
+                Console.WriteLine("1. 显示所有版本");
+                Console.WriteLine("2. 下载指定版本");
+                Console.WriteLine("3. 退出");
+                Console.Write("请选择操作: ");
+                
+                var input = Console.ReadLine();
+                
+                switch (input)
+                {
+                    case "1":
+                        versionManager.DisplayAllVersions();
+                        break;
+                    case "2":
+                        Console.Write("请输入要下载的版本名称: ");
+                        var version = Console.ReadLine();
+                        await downloadService.DownloadVersion(version);
+                        break;
+                    case "3":
+                        return;
+                    default:
+                        Console.WriteLine("无效输入，请重新选择");
+                        break;
+                }
+                
+                Console.WriteLine();
+            }
+        }
+    }
+}