first commit

SSG_Coder/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace SSG_Coder
+{
+    static class Program
+    {
+        /// <summary>
+        /// 해당 애플리케이션의 주 진입점입니다.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            System.Diagnostics.Process[] processes = null;
+            string processName = System.Diagnostics.Process.GetCurrentProcess().ProcessName.ToUpper();
+            processes = System.Diagnostics.Process.GetProcessesByName(processName);
+            if (processes.Length > 1)
+            {
+                MessageBox.Show("프로그램이 이미 실행중입니다.");
+                return;
+            }
+
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new MainForm());
+        }
+    }
+}