Write a program in C# Sharp to create a function to calculate the sum of the individual digits of a given number

using System;
public class funcexer10
{     
public static int SumCal( int n ) 
    { 
       string n1 = Convert.ToString(n);
       int sum = 0;  
       for (int i = 0; i < n1.Length; i++)
         sum += Convert.ToInt32(n1.Substring(i,1));
         return sum;
    }
public static void Main() 
    {
	  int num;
	  Console.Write("\n\nFunction : To calculate the sum of the individual digits of a number :\n");
      Console.Write("--------------------------------------------------------------------------\n");   
      Console.Write("Enter a number: ");
      num = Convert.ToInt32( Console.ReadLine() );
      Console.WriteLine("The sum of the digits of the number {0} is : {1} \n",num,SumCal(num));    
    }
}