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KO CSharp Keyword abstract
Codex edited this page Oct 11, 2026
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2 revisions
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직접 인스턴스화되지 않은 클래스 또는 비추상 하위 항목에 필요한 구현되지 않은 멤버를 나타냅니다.
이 예제를 Example.cs로 따로 저장하고 이 페이지의 다른 예제와 독립적으로 실행하세요.
Example.cs:
// PROJECT-EXAMPLE
Shape shape = new Square();
System.Console.WriteLine(shape.Area);
abstract class Shape { public abstract int Area { get; } }
class Square : Shape { public override int Area => 4; }결과:
4
abstract class Base { public abstract void Run(); }using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
public static class Program
{
public static async Task Main(string[] args)
{
Entity entity = new Player("Archer");
Console.WriteLine(entity.Describe());
Console.WriteLine(entity.Code);
}
}
public interface ILabel { string Label { get; } }
public abstract class Entity : ILabel
{
private readonly string name;
protected Entity(string name) { this.name = name; }
protected string Name => name;
internal int Code { get; set; } = 7;
public virtual string Label => Name;
public abstract string Describe();
}
public sealed class Player : Entity
{
public Player(string name) : base(name) { }
public override string Label => "Player: " + base.Label;
public override string Describe() => Label;
}using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
public static class Program
{
public static async Task Main(string[] args)
{
Shape shape = new Square(3);
Console.WriteLine(shape.Area);
}
}
public abstract class Shape { public abstract int Area { get; } }
public sealed class Square(int side) : Shape { public override int Area => side * side; }공식 출처: Microsoft 학습.
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