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C#: foreach

Handbook C# · Practical Guide

Iterates the sequence elements; await foreach reads an asynchronous sequence.

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[] names = ["ore", "wood"];
foreach (string name in names) System.Console.WriteLine(name);

Result:

ore
wood

Syntax

foreach (var item in items) { ... }

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)
    {
        string[] names = ["ore", "wood"];
        foreach (string name in names) Console.WriteLine(name);
    }
}

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)
    {
        Dictionary<string, int> counts = new() { ["ore"] = 5, ["wood"] = 3 };
        foreach (var (name, count) in counts) Console.WriteLine($"{name}={count}");
    }
}

Official source: Microsoft Learn.