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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Windows.Forms;
  5.  
  6. namespace WindowsFormsApplication1
  7. {
  8.     static class Program
  9.     {
  10.         /// <summary>
  11.         /// アプリケーションのメイン エントリ ポイントです。
  12.         /// </summary>
  13.         [STAThread]
  14.         static void Main()
  15.         {
  16.             Application.EnableVisualStyles();
  17.             Application.SetCompatibleTextRenderingDefault(false);
  18.             Form[] forms = new Form[3];
  19.  
  20.             for (int i = 0; i < forms.Length; ++i)
  21.             {
  22.                 forms[i] = new Form();
  23.                 forms[i].FormClosed += (sender, e) => {
  24.                     int count = 0;
  25.                     foreach (Form f in forms)
  26.                     {
  27.                         if (f.Visible == false) count++;
  28.                     }
  29.                     if (count == 2)
  30.                         Application.Exit();
  31.                 };
  32.                 forms[i].Show();
  33.             }
  34.  
  35.             Application.Run();
  36.         }
  37.     }
  38. }
  39.  
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https://ideone.com/yhL1E
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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