摘要：program.cs static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); login lf = new login(); lf.ShowDialog(); if (lf.DialogResult == DialogResult.Yes) { Application.Run(new main()); } }login.cs if (xxx) { MessageBox.Show("用户名和密码不正确"); } el 阅读全文