//кодируем пароль
                    string password = "Test";
                    SecureString secureString = new SecureString();
                    foreach (char chr in password) secureString.AppendChar(chr);



Process pr = new Process();
                pr.StartInfo.UseShellExecute = false;
                pr.StartInfo.FileName = @"C:Users" + userName + @"DocumentsDLL2.bat";
                pr.StartInfo.Verb = "runas";
                pr.StartInfo.UserName = "admin";
                pr.StartInfo.Domain = "os";
                pr.StartInfo.Password = secureString;
                pr.Start();