Program.cs

using System.Security.Principal;
using System.Windows.Forms;

namespace P5X_Gacha_Link
{
    internal static class Program
    {
        /// <summary>
        ///  The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            // 관리자 권한 확인
            using (WindowsIdentity identity = WindowsIdentity.GetCurrent())
            {
                WindowsPrincipal principal = new WindowsPrincipal(identity);
                if (!principal.IsInRole(WindowsBuiltInRole.Administrator))
                {
                    MessageBox.Show("이 프로그램은 반드시 관리자 권한으로 실행해야 합니다.", "권한 필요", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return; // 관리자 권한이 아니면 종료
                }
            }

            // To customize application configuration such as set high DPI settings or default font,
            // see https://aka.ms/applicationconfiguration.
            ApplicationConfiguration.Initialize();
            Application.Run(new Form1());
        }
    }
}