Gets an item from an Item URI.
[Item Defined]
An Item URI is a pointer to an item in a database. It uniquely identifies the item within the system and represents database name, item ID, item language and item version.
The following example retrieves the Home item from the database.
ItemUri uri = new ItemUri("/sitecore/content/Home", "master");
Item item = Database.GetItem(uri);
Database Class | Sitecore.Data Namespace