Question

How to copy a range of elements from an array (index N) to another array with Array.ConstrainedCopy() method in C#

Answer 1

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr1 = { 1, 2, 3, 4, 5, 6 };
            int[] arr2 = { 9, 9, 9, 9, 9, 9 };

            Array.ConstrainedCopy(arr1, 0, arr2, 0, arr1.Length);

            Console.WriteLine("arr1");
            foreach (int value in arr1)
                Console.WriteLine(value);
            
            Console.WriteLine("arr2");
            foreach (int value in arr2)
                Console.WriteLine(value);
        }
    }
}

/*
run:
  
arr1
1
2
3
4
5
6
arr2
1
2
3
4
5
6

*/

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Answer 2

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr1 = { 1, 2, 3, 4, 5, 6 };
            int[] arr2 = { 9, 9, 9, 9, 9, 9 };

            Array.ConstrainedCopy(arr1, 0, arr2, 0, 3);

            Console.WriteLine("arr1");
            foreach (int value in arr1)
                Console.WriteLine(value);
            
            Console.WriteLine("arr2");
            foreach (int value in arr2)
                Console.WriteLine(value);
        }
    }
}

/*
run:
  
arr1
1
2
3
4
5
6
arr2
1
2
3
9
9
9

*/

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Answer 3

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr1 = { 1, 2, 3, 4, 5, 6 };
            int[] arr2 = { 9, 9, 9, 9, 9, 9 };

            Array.ConstrainedCopy(arr1, 2, arr2, 2, 3);

            Console.WriteLine("arr1");
            foreach (int value in arr1)
                Console.WriteLine(value);
            
            Console.WriteLine("arr2");
            foreach (int value in arr2)
                Console.WriteLine(value);
        }
    }
}

/*
run:
  
arr1
1
2
3
4
5
6
arr2
9
9
3
4
5
9

*/

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