Help with a Save and Load Button

Hey guys, im writing a basic database program for my class in school. i currently have these codes for my buttons:

load:
OpenFileDialog1.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*"
OpenFileDialog1.ShowDialog()

Save:
SaveFileDialog1.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*"
SaveFileDialog1.ShowDialog()

I have 6 text boxs adding data that needs to be saved to a text file.
i may need to add more text boxs later as needed.
any help is really appreciated.