Public Function SaveChanges() As Integer Implements IUnitOfWork.SaveChanges
            Try
                ApplyCorrectYeKe()
                'auditFields()
                Return MyBase.SaveChanges()
            Catch validationException As DbEntityValidationException
                '...
            Catch concurrencyException As DbUpdateConcurrencyException
                '...
            Catch updateException As DbUpdateException
                '...
            End Try
        End Function

try
{
applyCorrectYeKe();



auditFields();



//and another methods ...



Return base.SaveChanges();
}
catch (DbEntityValidationException validationException)
{
   //...
}
catch (DbUpdateConcurrencyException concurrencyException)
{
   //...
}
catch (DbUpdateException updateException)
{
   //...
}

 Return Base.SaveChanges();