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;
        }
    }
}

public partial class Form1 : Form
   {
       Point clickPoint = new Point();

       public Form1()
       {
           InitializeComponent();

           panel1.Location = new Point(0, 0);
           this.HorizontalScroll.SmallChange = 1;
           this.VerticalScroll.SmallChange = 1;
       }

       private void panel1_MouseDown(object sender, MouseEventArgs e)
       {
           if(e.Button == System.Windows.Forms.MouseButtons.Left)
               clickPoint = e.Location;
       }

       private void panel1_MouseMove(object sender, MouseEventArgs e)
       {
           if (e.Button == System.Windows.Forms.MouseButtons.Left)
           {
               Point diff = new Point(
                     clickPoint.X - e.Location.X,
                     clickPoint.Y - e.Location.Y);

               // Add the difference to scrollbars current value
               this.HorizontalScroll.Value =
                  Math.Min(Math.Max((this.HorizontalScroll.Value + diff.X),
                  this.HorizontalScroll.Minimum),
                  this.HorizontalScroll.Maximum);

               this.VerticalScroll.Value =
                  Math.Min(Math.Max((this.VerticalScroll.Value + diff.Y),
                  this.VerticalScroll.Minimum),
                  this.VerticalScroll.Maximum);

               // This also gives the same problem
               /*
               this.HorizontalScroll.Value =
                  Math.Min(Math.Max((this.HorizontalScroll.Value + diff.X),
                  this.HorizontalScroll.Minimum),
                  (panel1.Width-this.ClientRectangle.Width)); // <- here

               this.VerticalScroll.Value =
                  Math.Min(Math.Max((this.VerticalScroll.Value + diff.Y),
                  this.VerticalScroll.Minimum),
                  (panel1.Height - this.ClientRectangle.Height)); // <- here
               */
           }
       }
   }

Panel1.left += e.X - clickPoint.X; // Bad Idea
Panel1.top += e.Y - clickPoint.Y; // Bad Idea

RegistryKey rk = Registry.LocalMachine;
                RegistryKey rkprograms = rk.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Uninstall");
                foreach (string s in rkprograms.GetSubKeyNames())
                {
                    int idx;
                    idx = s.IndexOf(".NET");// see if anything with .NET in the name is installed e.g. Microsoft .NET Framework
                    Console.WriteLine(idx);
                    {
                        Console.WriteLine(s);
                    }
                    Console.ReadKey(true);
                }