C#

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);
                }