In Xamarin Studio open the settings menu:
- Windows: Tools > Options
- OS X: Xamarin Studio > Preferences
Navigate To Text Editor -> Code Templates
Here you can edit snippets that come with Xamarin studio as well as add new ones. For syntax I'd recommend just looking at one of the already present properties.
E.g. default property looks like this:
public $type$ $name$ {
get;
set;
}
You could change that to have a backing store:
private $type$ _$name$;
public $type$ $name$ {
get { return _$name$; }
set { _$name$ = value; }
}