I wrote a C# text based game. I called it 'Haunted Mansion'.

Basically you explore a mansion and can pick up items, add them to your inventory, and attack a few bosses in it. When I have time I sometimes update it to do a little more.

If you decide to go with VB.Net I think you can convert my code over to VB.

Although I think writing a program/game from scratch will teach you a lot more than using another program/game as a guideline.

Ignore all the people saying one language is more suitable for a text based game. That's total nonsense. VB, python, c#, c++, so long as it can output text, it's suitable.

Ultimately, use whichever you're the most comfortable with. VB is certainly a perfectly valid option.