C#

namespace Calculator
{
    public partial class Form1 : Form
    {
        private int sumSoFar;

        private int[] numcalc = new int[10];

        public Form1()
        {
            InitializeComponent();
            sumSoFar = 0;

            for (int i = 0; i < 10; i++)
            {
                numcalc[i] = 0;
            }

        }

        private void button0_Click(object sender, EventArgs e)
        {
            numcalc[0] = 0;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            numcalc[1] = 1;
        }


        private void button2_Click(object sender, EventArgs e)
        {
            numcalc[2] = 2;
        }

        private void button3_Click(object sender, EventArgs e)
        {
            numcalc[3] = 3;
        }

        private void button4_Click(object sender, EventArgs e)
        {
            numcalc[4] = 4;
        }

        private void button5_Click(object sender, EventArgs e)
        {
            numcalc[5] = 5;
        }

        private void button6_Click(object sender, EventArgs e)
        {
            numcalc[6] = 6;
        }

        private void button7_Click(object sender, EventArgs e)
        {
            numcalc[7] = 7;
        }

        private void button8_Click(object sender, EventArgs e)
        {
            numcalc[8] = 8;
        }

        private void button9_Click(object sender, EventArgs e)
        {
            numcalc[9] = 9;
        }



        private void button13_Click(object sender, EventArgs e)

       {
            MathOps.Service1SoapClient MathOpsObj  = new MathOps.Service1SoapClient() ;

            sumSoFar = MathOpsObj.AddValues(numcalc); 

<< err in this line, I thought numcalc is an array that can be passed as argument to web service, somehow getting error>>
        }


    }
}

namespace MathOps
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
    // [System.Web.Script.Services.ScriptService]
    public class Service1 : System.Web.Services.WebService
    {

        [WebMethod]
        public int AddValues(int [] num)
        {
            int sumSoFar = 0;

            for (int i = 0; i < 10; i++)
            {
                sumSoFar = sumSoFar + num[i];
            }

            return sumSoFar;
        }
    }
}