Get Id of recently added record in Linq.

After you commit your object into the db the object receives a value in its ID field.
So:

myObject.Field1 = "value";

// Db is the datacontext
db.MyObjects.InsertOnSubmit(myObject);
db.SubmitChanges();
//in case of Repository pattern
db.InsertorUpdate(myObject);
db.commit();

// You can retrieve the id from the object
int id = myObject.ID;