EN CSharp Operator Equality

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Equality

Handbook C# · Practical Guide

Checks for equality or inequality. For classes, the normal comparison often checks references; string and record have behavior by value.

Simple example (Example.cs)

Save this example separately as Example.cs. Run it independently of the other examples on this page.

Example.cs:

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

Result:

True

Syntax

left == right / left != right

Example 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");
    }
}

Example 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);

Official source: Microsoft Learn.