can you help simple richtext box question in c#

Hi everyone,

Hope you can help. I am brand new to Visual Studio C# express.

I have a series of buttons on my form, and I have a richtext box.

I want each button to have an entry in the richtext box, so I press button A, and the text belonging to button A is put into the richtext box, then I press but C, and the richtext box is cleared and the text belonging to button C is put into the rich text box.

I also want a save button so the text can be saved, so when the form reloads if someone presses button A, then the text belonging to button A will be loaded again.

Can you help ,

Thanks