[ 1 ] using System. Linq;
This namespace defines that we are using LINQ query mechanism , and it will provide intellisense to use necessary attributes
[ 2 ] Data Source
It defines that we are using "StudentDataContext" , it means we are connected to database by this object .
[ 3 ] Executing Query
As you can see query is there , so that its time to execute LINQ to SQL query as above example , it will print all result that returned by "stdNames" variable
Normally it does
- Create connection to database
- It submits and retrives object to database
- Convert object to SQL queries and vice versa