Create a stored setting using buttons (Visual Studio 2013)

so, I have a question, for example, I have created a setting called "example" and it's value is "test". I want my label's text to be the examples text using Label1.Text = My.Settings.example(). But I would like to know how to create a new setting using a button, so when I click the button, it will create a new setting called "example2" and it's value "test2", and I would also like to know how to DELETE an setting using a button, thankyou, sorry for my english.