main

Launcher_App/ProgramLauncher/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace ProgramLauncher
+{
+    internal static class Program
+    {
+        public static string projectName = "StudioInstaller";
+        static string mutexName = "UVC_";
+
+        [STAThread]
+        static void Main()
+        {
+            mutexName = mutexName + projectName;
+
+            using (var mutex = new Mutex(true, mutexName, out bool isNewInstance))
+            {
+                if (!isNewInstance)
+                {
+                    // 이미 실행 중인 경우
+                    MessageBox.Show("이미 프로그램이 실행 중입니다.", "중복 실행 방지", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                    return;
+                }
+
+                Application.EnableVisualStyles();
+                Application.SetCompatibleTextRenderingDefault(false);
+                Application.Run(new Form1());
+            }
+        }
+    }
+}