Visual Basic

$7.$ For Add Bagel Type:

a$.$ write code that uses the bagel type entered in the combo box

b$.$ add the bagel type to the list

c$.$ include code that validates the users input

d$.$ ensure the user cannot enter a blank bagel type.

$8.$ Write a loop that will:

a$.$ prevent the user from adding duplicate bagel types

b$.$ the check for duplicates should be case insensitive $($Garlic $=$ GARLIC $=$ garlic$)$

c$.$ Do not use the Contains method.