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平等

使用手冊C# · 實用指南

檢查相等或不相等。對於類，正常的比較經常會檢查引用； string 和記錄具有按值行為。

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
string first = "ore";
string second = new string(['o', 'r', 'e']);
System.Console.WriteLine(first == second);

結果:

True

句法

left == right / left != right

範例1

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)
    {
        string left = "ore", right = new string(['o', 'r', 'e']);
        Console.WriteLine(left == right);
        Console.WriteLine(left != "wood");
    }
}

範例2

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(1, 2), second = new(1, 2);
        Console.WriteLine(first == second);
    }
}
public readonly record struct Point(int X, int Y);

官方來源：Microsoft學習。