Working with C# application or others .NET application, we usually use hard-code to manage the application settings, eg: control position, control label, control text, etc. However, with some settings, eg: database connections string, file directory, we should use app.config to store them. This will help the settings easy to be read and written dynamically.
With Microsoft SQL Server Management Studio, in default, you can use Windows account or default SQL Server administrator account to connect your computer database engine and manage databases. However, if you want to share a database with any people via network connection (LAN or Internet), you shouldn't share the default account information with them. Then, you need to create a new user for your database and share it.
Apple no longer supports for Atom processors from Mac OS X 10.6.2. So, you can't normally upgrade your Mac OS X from Snow Leopard 10.6.1 or earlier to 10.6.2 or later. If you try to normally upgrade it, you'll get an black screen with errors after restarting. The reason is the mach kernel of Snow Leopard 10.6.3 or later don't detect any Atom processor. Then this tip maybe help you.