static void Main(string[] args)
{
    int i, j;
    int[, ] arr = new int[ 3, 3];
    for (i = 0; i < 3; ++i)
    {
        for (j = 0; j < 3; ++j)
        {
            arr[i, j] = i * 2 + i * 2;
            Console.WriteLine(arr[i, j]);
        }
        Console.ReadLine();
    }
}

static void Main(string[] args)
 {
     char A = 'K';
     char B = Convert.ToChar(76);
     A++;
     B++;
     Console.WriteLine(A+ "  " +B);
     Console.ReadLine();
 }

int[][]a = new int[2][];
a[0] = new int[3]{3, 4, 2};
a[1] = new int[2]{8, 5};
foreach( int[]i in a)
{
/* add for loop */
console.write( j+ " ");
console.writeline();
}

static void Main(string[] args)
{
    double a = 345.09;
    byte c = (byte) a;
    Console.WriteLine(c);
    Console.ReadLine();
}

static void Main(string[] args)
{
    Program p = new Program();
    p.display(2, 3, 8);
    int []a = { 2, 56, 78, 66 };
    Console.WriteLine("example of array");
    Console.WriteLine("elements added are");
    p.display(a);
    Console.ReadLine();
}
public void display(params int[] b)
{
    foreach (int i in b)
    {
        Console.WriteLine("ARRAY IS HAVING:{0}", i);
    }
}