Entity Framework does not update Foreign Key object

Question

I\'m new to Entity Framework and this behavior confuses me:

    [Table(\"ClinicProfile\")]
    public class ClinicProfile
    {
        [Key]
        [Databa         


        

Answer 1

if you set to existing ClinicProfile new ContactData you should first save new ContactData to db, second get its new Id and third update ClinicProfile with new ContactDataId.

clinicProfile.ContactDataId = newContactData.Id;
SharedContext.Current.Entry(clinicProfile).State = EntityState.Modified;
SharedContext.Current.SaveChanges();

if you want to update existing ContactData properties then you should save only it.

SharedContext.Current.Entry(existingContactData).State = EntityState.Modified;
SharedContext.Current.SaveChanges();