C# Tutorial "Visibility and Accessibility Modifiers" : Exercise: Use the abstract modifier | .NET Academy

Visibility and Accessibility Modifiers

Exercise: Use the abstract modifier

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Goal

Modify the example classes

Modify the Person class to make it abstract
Implement the abstract method 'GetPostcode' in the 'Customer' class, returning a string.

using System;

public class Person
{
	public abstract string GetPostcode();
}

public class Customer : Person
{
	
}

public class Program
{
	public static void Main(string[] args)
	{
		var person = new Customer();
        Console.WriteLine(person.GetPostcode());
	}
}