Search notes:

Microsoft.Win32.Registry (class)

Top level registry keys

Microsoft.Win32.Registry provides the top level Microsoft.Win32.RegistryKey objects for some registry hives.
These keys can be accessed through the following static fields:
The type of these fields is unsurprsingly Microsoft.Win32.RegistryKey, as demonstrated with PowerShell: 
PS: 16 C:\Users\rene> [Microsoft.Win32.Registry]::ClassesRoot.GetType().FullName
Microsoft.Win32.RegistryKey

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Microsof...', 1788389394, '216.73.217.21', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Microsoft/dot-net/namespaces-classes/Microsoft/Win32/Registry/index(48): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78