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  1. public partial class Form1 : Form
  2.     {
  3.         public Form1()
  4.         {
  5.             InitializeComponent();
  6.  
  7.  
  8.         }
  9.  
  10.         public Control AddControl(Control c)
  11.         {
  12.             this.Controls.Add(c);
  13.             return c;
  14.         }
  15.         public Control CreateControl()
  16.         {
  17.             return new Control();
  18.         }
  19.  
  20.         private void button1_Click(object sender, EventArgs e)
  21.         {
  22.             var list = new List<int>() { 1,2,3,4,5 };
  23.  
  24.             var list2 = list.Select((v) => this.CreateControl());
  25.             list2.ForEach((v) => this.AddControl(v));
  26.             list2.ForEach((v) => Console.WriteLine(v.Parent.Name));
  27.         }
  28.  
  29.         private void button2_Click(object sender, EventArgs e)
  30.         {
  31.  
  32.             var list = new List<int>() { 1, 2, 3, 4, 5 };
  33.  
  34.             var list2 = list.Select((v) => this.CreateControl());
  35.             var list3 = list2.Select((v) => this.AddControl(v));
  36.             list3.ForEach((v) => Console.WriteLine(v.Parent.Name));
  37.         }
  38.  
  39.     }
  40.     public static class LinqExtension
  41.     {
  42.         public static void ForEach<T>(this IEnumerable<T> arr, Action<T> pred)
  43.         {
  44.             foreach (var v in arr) { pred(v); }
  45.         }
  46.     }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cs(1,30): error CS0246: The type or namespace name `Form' could not be found. Are you missing a using directive or an assembly reference?
Compilation failed: 1 error(s), 0 warnings
stdout
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Standard output is empty
https://ideone.com/Xqxm3
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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