Let me close without asking if I want to save
I use LinqPad almost entirely for one-off, throwaway queries -- for example, I'll use one of our utility classes to do a quick calculation. When I close LinqPad, the "do you want to save?" prompt is a pointless annoyance.
It would be much nicer if LINQPad followed the model of how Web browsers save and restore tabs.
Never prompt me to save; just autosave my documents to a temp location and then exit.
Next time I open, give me an unobtrusive way to see my old queries and reopen them if I wish; but if I'd rather just start a new session, don't get in my way. (Or perhaps auto-reopen any named files with edits; but definitely don't reopen the untitled documents unless I ask.)
And when I close the new session, permanently discard any untitled documents from the prior session (unless I reopened them this time, in which case they'd get re-saved with this session).

This is a duplicate of http://linqpad.uservoice.com/forums/18302-linqpad-feature-suggestions/suggestions/2418780-save-restore-queries-on-close-or-manually and has been implemented for some time in LINQPad 6.
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Anonymous commented
Do like sublime text. If you close the app, it will just open the same tabs when you open the application next.
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Gert_Arnold commented
Notepad++ has this auto-save feature. It's the main reason why I prefer it to other text editors I used before. If I reopen Notepad++ it just returns to the state in which I left it. Linqpad does that when it crashed (or was force-closed), so I think the feature is within reach.
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Drew Noakes commented
Actually, this is a duplicate of this request:
I'm going to apply my comment and votes there instead.
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Drew Noakes commented
Came here to say this. I would love this feature. I've taken to closing LINQPad from Task Manager so that when I reopen it, my query tabs are back to how they were when I left off. Please add this feature! The autosave/restore stuff is already there, so hopefully it's just a config setting and UI change.