A win for far-right presidential candidate Marine Le Pen would spell the end of the EU – but the French are not crazy enough to let that happen, insists European Commissioner Pierre Moscovici.

"I'm confident. I know my citizens and my compatriots well and know they are not going to elect a candidate who is proposing France exiting (Europe). That would be the end of the European project," Moscovici, who is European Commissioner for Economic and Financial Affairs, told CNBC Monday.