NullReferenceException

.NET .NET Framework AdjustTokenPrivileges Applets ascx ASPNET aspx BodyEncoding C# classes class library commenting compilation compiler configuration ConnectionManagementElement ConnectionManagementElement DefaultConnectionLimit connections limit content CSharp CurrentUser Database Deployment development cycle digital camera dll download data DownloadData download images download page DownloadString download string DownloadStringAsync e-mail EnableSsl Encoding Enumeration errors exceptions exceptions handling exit ExitWindowsEx FileNotFoundException framework functions GAC GetSubKeyNames GetValue Global Assembly Cache GMail HttpWebRequest HttpWebResponse IIS Imaging imaging devices lastkey library LocalMachine logoff LookupPrivilegeValue Machine Account MailMessage Management Studio Express markup MaxConnection Microsoft.VisualBasic Microsoft.Win32 Microsoft.Win32.Registry mistakes multi threading namespaces NetworkCredential Nothing Null NullReferenceException obfuscation object object-oriented model open hive open key OpenProcessToken open specific key override Permissions Priority protection publishing Quiz reboot references regedit RegIis regions Registry Registry Editor RegistryKey resources restart runtime errors scanner ServicePointManager SetValue shutdown Skill SmtpClient SmtpClient.Send SmtpClient.SendAsync source code SQL Server SSL StreamReader strict vb.net SubKeys subs switch off System.Configuration System.IO System.Net.Mail System.Windows.Forms.Clipboard Test thread safety try catch block turn off Tutorial two connections Values VB.NET vb6 Visual Basic.NET visual basic namespace Visual Studio 2008 Vusual Studio warning configuration web application webbrowser control webcam WebClient webpage download WebRequest WebResponse web service website website download WIA WIALib windows Windows Image Acquisition wrapper