インストーラーを使用せずに、Windows でプログラムによってファイル拡張子をアプリケーションに関連付けるにはどうすればよいですか?

<code class="language-csharp">public static void SetAssociation(string extension, string keyName, string fileDescription, string executablePath)
{
    // 以读写权限打开当前用户的注册表
    using (RegistryKey currentUser = Registry.CurrentUser.OpenSubKey(@"HKEY_CURRENT_USER", RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.FullControl))
    {
        using (RegistryKey baseKey = currentUser.CreateSubKey(extension))
        {
            baseKey.SetValue("", keyName);
        }

        using (RegistryKey openMethodKey = currentUser.CreateSubKey(keyName))
        {
            openMethodKey.SetValue("", fileDescription);

            // 如果“DefaultIcon”子密钥不存在，则创建它
            if (openMethodKey.OpenSubKey("DefaultIcon") == null)
            {
                using (RegistryKey defaultIconKey = openMethodKey.CreateSubKey("DefaultIcon"))
                {
                    defaultIconKey.SetValue("", "\"" + executablePath + "\",0");
                }
            }

            // 创建 Shell 子密钥并编辑和打开命令子密钥
            using (RegistryKey shellKey = openMethodKey.CreateSubKey("Shell"))
            {
                using (RegistryKey editKey = shellKey.CreateSubKey("edit"))
                {
                    using (RegistryKey editCommandKey = editKey.CreateSubKey("command"))
                    {
                        editCommandKey.SetValue("", "\"" + executablePath + "\" \"%1\"");
                    }
                }

                using (RegistryKey openKey = shellKey.CreateSubKey("open"))
                {
                    using (RegistryKey openCommandKey = openKey.CreateSubKey("command"))
                    {
                        openCommandKey.SetValue("", "\"" + executablePath + "\" \"%1\"");
                    }
                }
            }
        }

        // 在 HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts 中设置 ProgId
        using (RegistryKey fileExtsKey = currentUser.CreateSubKey(@"Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\" + extension))
        {
            fileExtsKey.SetValue("Progid", keyName);
        }
    }

    // 通知资源管理器更改以刷新其文件关联
    SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_FLUSH, IntPtr.Zero, IntPtr.Zero);
}</code>

<code class="language-csharp">SetAssociation(".ucs", "UCS_Editor_File", "UCS File", Application.ExecutablePath);</code>