https://www.linqpad.net/

How to set the resultspane to monospace:

You can go to: 
Edit > Preferences > Results > Style sheet for text (HTML) results > Custom > Launch Editor
and add:

body { font-family: monospace; }

https://linqpad.uservoice.com/forums/18302-linqpad-feature-suggestions/suggestions/1398997-allow-fixed-width-font-for-the-results-pane

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