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  1.  
  2.     public partial class Form1 : Form
  3.     {
  4.         public Form1()
  5.         {
  6.             InitializeComponent();
  7.         }
  8.  
  9.         private void button1_Click(object sender, EventArgs e)
  10.         {
  11.             var f = new UserControl1() { AllowDrop = false};
  12.             this.Controls.Add(f);
  13.             this.Controls.Remove(f);
  14.             GCCheck();
  15.         }
  16.  
  17.         private void button2_Click(object sender, EventArgs e)
  18.         {
  19.             var f = new UserControl1() { AllowDrop = true};
  20.             this.Controls.Add(f);
  21.             this.Controls.Remove(f);
  22.             GCCheck();
  23.         }
  24.         private void GCCheck()
  25.         {
  26.             var a = GC.GetTotalMemory(false);
  27.             var b = GC.GetTotalMemory(true);
  28.             Console.WriteLine("GC Before=" + a + " After=" + b);
  29.         }
  30.     }
  31.  
  32.  
  33. public partial class UserControl1 : UserControl
  34.     {
  35.         public UserControl1()
  36.         {
  37.             InitializeComponent();
  38.         }
  39.         ~UserControl1()
  40.         {
  41.             Console.WriteLine(this.GetType().Name + "は解放されました " + "{AllowDrop = " + this.AllowDrop + " }");
  42.         }
  43.     }
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https://ideone.com/H3v1I
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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