EN CSharp Keyword value

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C#: value

Handbook C# · Practical Guide

An implicit set/init/add/remove parameter with the value passed by the call.

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
var item = new Item();
item.Count = -2;
System.Console.WriteLine(item.Count);
class Item { private int count; public int Count { get => count; set => count = System.Math.Max(0, value); } }

Result:

0

Syntax

set => field = value;

Example 1: simple form

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)
    {
        Meter value = new();
        value.Amount = -2;
        Console.WriteLine(value.Amount);
    }
}
public class Meter { private int amount; public int Amount { get => amount; set => amount = Math.Max(0, value); } }

Example 2: another practical form

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)
    {
        Storage storage = new();
        storage[0] = "ore";
        Console.WriteLine(storage[0]);
    }
}
public class Storage { private readonly string[] values = new string[2]; public string this[int index] { get => values[index]; set => values[index] = value; } }

Official source: Microsoft Learn.