//CREATE == insert
public void CreateLoan(Loans loan)
{
//dbContext.LibraryItems.Attach(loan.LoanedItem);
//dbContext.Students.Attach(loan.Student);
dbContext.Loans.Add(loan);
dbContext.SaveChanges();
}
//Update
public void UpdateLoan(Loans loan)
{
dbContext.Entry <Loans>(loan).State = EntityState.Modified;
dbContext.SaveChanges();
}