Invalid token 'while' in class, struct, or interface member declaration in very simple code

Question

I am not sure what the problem is but I keep receiving this error when I try to use a while statement in my code.

Invalid token \'while\' in class,

Answer 1

C# does not provide writing the for, while or foreach kind of looping statement directly inside the class. These statements should be within a user defined method, main method or constructors.

  class Array
{
    public static void main(string[] args)
    {
        int[] n = new int[10]; /* n is an array of 10 integers */

        /* initialize elements of array n */
        for (int i = 0; i < 10; i++)
        {
            n[i] = i + 100;
        }

        /* output each array element's value */
        foreach (int j in n)
        {
            int i = j - 100;
            Console.WriteLine("Element[{0}] = {1}", i, j);
        }
    }


}