private void OnFIleMenuExportClick(object sender, EventArgs e)
        {
            var result = exportHostDialog.ShowDialog(this);

            if (result != DialogResult.Yes && result != DialogResult.OK)
            {
                return;
            }
            try
            {
                using var stream = exportHostDialog.OpenFile();
                using var writer = new StreamWriter(stream, Encoding.UTF8);
                writer.Write(JsonConvert.SerializeObject(Settings.Default.hosts));
                MessageBox.Show(
                    string.Format(Resources.StrExportFileAt, exportHostDialog.FileName),
                    Resources.StrExportSuccess,
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Information
                    );
            }
            catch (Exception exception)
            {
                LogForm.Error("导出文件出现错误:" + exception.Message);
                MessageBox.Show(
                    exception.Message,
                    Resources.StrExportFileError,
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Error
                    );
            }
        }