Entity Framework and Try Catch Exception (LINQ, Entity Framework)

                try
                {
                    // Statement
                }
                catch (Exception ex)
                {
                    // ex.InnerException.InnerException.Message;
                }

        Try
            ' Statement
        Catch ex As Exception
            ' ex.InnerException.InnerException.Message
        End Try

        private void frmMain_Load(object sender, EventArgs e)
        {          
             // Create new entities from Entities
            using (var db = new myDatabaseEntities())
            {
                try
                {
                    // Insert New Customer
                    db.CUSTOMER.Add(new CUSTOMER()
                    {
                        CUSTOMER_ID = "C005",
                        NAME = "Rut Wisarut",
                        EMAIL = "[email protected]",
                        COUNTRY_CODE = "TH",
                        BUDGET = 5000000,
                        USED = 0,
                    });
                    db.SaveChanges();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.InnerException.InnerException.Message);
                }
            }
        }

    Private Sub frmMain_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        ' Create new entities from Entities
        Using db = New myDatabaseEntities()
            Try
                ' Insert New Customer
                db.CUSTOMER.Add(New CUSTOMER() With { _
                    .CUSTOMER_ID = "C005", _
                    .NAME = "Rut Wisarut", _
                    .EMAIL = "[email protected]", _
                    .COUNTRY_CODE = "TH", _
                    .BUDGET = 5000000, _
                    .USED = 0 _
                })
                db.SaveChanges()
            Catch ex As Exception
                MessageBox.Show(ex.InnerException.InnerException.Message)
            End Try
        End Using
    End Sub