uncomment following lines and

[todo]

Presentations/2019/shorts/NetCore3.0WhatsNew/NetCore3WhatsNew/CSharp8WhatsNew/Program.cs

Lines 84 to 89 in 78b873b

	//TODO: uncomment following lines and
	// IMamal : IAnimal
	//What is this line doing:
	//IAnimal pig = new Pig();
	}

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This issue was generated by todo based on a TODO comment in 78b873b. It's been assigned to @ignatandrei because they committed the code.