Consider the program:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {

			//string
			string str = "Hello, How are you?";
           
            int i = 0;
			
			//character array declaration
            char[] CH;
			
			//converting string to character array
            CH = str.ToCharArray();

			//printing character array character by character
            for (i = 0; i < CH.Length;i++ )
            {
                Console.Write(CH[i] + "");
            }

            Console.WriteLine();
        }
    }
}

Output

Hello, How are you?

In this program str is a string type variable, Using string.ToCharArray() method we copied the character of string str to CH.

And then, we are getting the length of the character array (CH) using Length property and printing character by character of CH (character array)