LINQ to SQL, DataContext issue

While using LINQ to SQL, I created a static DataContext in my custom class i.e.

public class OPIS
 {
 public static DataContext DataContext = new DataContext();
 ....
}

Now whenever i need to query (including insert and delete) results via LINQ i use this static DataContext object. I never figured out a problem until I was unable to get the the recently inserted object in one of the EntitySet e.g.

I have a Profile and a BasicInfo EntityType with one-to-one relationship with eachother.

//Inserting a new BasicInfo Object, have created association with Profile object before
OPIS.DataContext.BasicInfos.InsertOnSubmit(basicInfoObject);

Now on another page

Profile profile = //get new profile from linq, comming fine

BasicInfo bi = profile.BasicInfo //returning null, it shouldn't

bi should return an object of associated Bas开发者_开发问答icInfo with profile, but it is not. Why?

Are you ever calling SubmitChanges() on your DataContext? If not, then all you are doing is registering the BasicInfo for insertion, but never inserting it.

OPIS.DataContext.BasicInfos.InsertOnSubmit(basicInfoObject); //registers object for insertion
OPIS.DataContext.SubmitChanges(); // performs insert