// 在软件启动时，设置显示语言
   string lang = "en";  // 英文：en   中文：zh-CN 
   System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo(lang);

        // using System.ComponentModel
        // using System.Globalization;
        // using System.Threading;

        // 当前语言 
        ComponentResourceManager languageMgr = new ComponentResourceManager(typeof(LangueSelectForm));

        // 刷新界面控件
        private void RefreshAllControls(Control parentControl)
        {
            foreach (Control control in parentControl.Controls)
            {
                languageMgr.ApplyResources(control, control.Name);
                if (control.Controls.Count > 0)
                {
                    RefreshAllControls(control);
                }
            }
        }

        private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton1.Checked)
            {
                string lang = "en"; // 切换为 “英语”
                Thread.CurrentThread.CurrentUICulture = new CultureInfo(lang);
                this.RefreshAllControls(this);
            }
        }

        private void radioButton2_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton2.Checked)
            {
                string lang = "zh-CN"; // 切换为 “中文”（默认）
                Thread.CurrentThread.CurrentUICulture = new CultureInfo(lang);
                this.RefreshAllControls(this);
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Thread.CurrentThread.CurrentUICulture = CultureInfo.CurrentCulture; // 切换为 默认
            this.RefreshAllControls(this);
        }