Csharp/CSharp Tutorial/Data Structure/Array ForEach

An Action triggered by Array.ForEach

using System;    
   
class MyClass { 
  public int i;  
   
  public MyClass(int x) { 
    i = x; 
  }
}
  
class MainClass {       
 
  static void show(MyClass o) { 
    Console.Write(o.i + " "); 
  } 
 
  public static void Main() {       
    MyClass[] nums = new MyClass[5];  
  
    nums[0] = new MyClass(5);  
    nums[1] = new MyClass(2);  
    nums[2] = new MyClass(3);  
    nums[3] = new MyClass(4);  
    nums[4] = new MyClass(1);  
     
    Console.Write("Contents of nums: ");   
 
    // Use action to show the values. 
    Array.ForEach(nums, MainClass.show); 
 
    Console.WriteLine();   
 
  }       
}

Contents of nums: 5 2 3 4 1

Array.ForEach with a delegate

using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;

public class MainClass
{
    public static void Main()
    {
        int[] array = new int[] { 8, 2, 3, 5, 1, 3 };
        Array.ForEach<int>(array, delegate(int x) { Console.Write(x + " "); });
        Console.WriteLine();
    }
}

8 2 3 5 1 3

foreach with Arrays

class MainClass
{
  static void Main()
  {
    int[] array = new int[]{1, 2, 3, 4, 5, 6};
    
    foreach (int item in array)
    {
        System.Console.WriteLine(item);
    }
   }
}

Use an Action to change the values

using System;    
   
class MyClass { 
  public int i;  
   
  public MyClass(int x) { 
    i = x; 
  }
}
  
class MainClass {       
 
  static void neg(MyClass o) {  
    o.i = -o.i; 
  }  
  
  public static void Main() {       
    MyClass[] nums = new MyClass[5];  
  
    nums[0] = new MyClass(5);  
    nums[1] = new MyClass(2);  
    nums[2] = new MyClass(3);  
    nums[3] = new MyClass(4);  
    nums[4] = new MyClass(1);  
     
    // Use action to negate the values. 
    Array.ForEach(nums, MainClass.neg); 
 
  }       
}