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C#: struct

使用手冊C# · 實用指南

宣告值type：賦值複製值。小型的不可變結構便於座標和結果。

簡單範例 (Example.cs)

請將此範例另存為 Example.cs，並與本頁其他範例分開執行。

Example.cs:

// PROJECT-EXAMPLE
Point original = new() { X = 2 };
Point copy = original;
copy.X = 9;
System.Console.WriteLine($"{original.X}:{copy.X}");
struct Point { public int X; }

結果:

2:9

句法

struct Name { ... } / readonly struct Name { ... }

例1：基本形式

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)
    {
        Point first = new(2, 3);
        Point copy = first;
        copy.X = 9;
        Console.WriteLine($"{first.X}:{copy.X}");
    }
}
public struct Point(int x, int y) { public int X = x; public int Y = y; }

例2：另一種實用形式

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)
    {
        Position position = new(2, 4);
        Console.WriteLine(position.X + position.Y);
    }
}
public readonly struct Position(int x, int y) { public int X { get; } = x; public int Y { get; } = y; }

官方來源：Microsoft學習。