Process items by numeric priority.

C#: PriorityQueue removes the item with the smallest priority value first.

using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Text.RegularExpressions;
using System.Collections.Generic;
using System.Globalization;
using System.Security.Cryptography;
using System.Threading;
using System.Threading.Tasks;

var queue = new PriorityQueue<string, int>();
queue.Enqueue("normal", 10);
queue.Enqueue("urgent", 1);
Console.WriteLine(queue.Dequeue());

Expected output EXAMPLE

urgent

Details

Use Program.cs in a .NET 8 console project and run dotnet run. Uses only the .NET standard libraries. PriorityQueue removes the item with the smallest priority value first.

Keep in mind

Equal-priority items do not have a guaranteed FIFO order.

✓ Verified

Tested on Ubuntu 24.04.5 LTS · 2026-11-02 18:05:23 UTC · 8.0.425 · libc6 2.39-0ubuntu8.9

Test inputs, results and environment

The exact published code ran in a dedicated Linux test container with prepared inputs. Unprivileged snippet process, external networking disabled, read-only root filesystem, and a fresh temporary working directory. Fixtures and output records are isolated from the application database. Testing covers this example and its stated checks, not every input, operating system, or runtime version. The Linux container shares its host's kernel; this is not a native Windows test.

Architecture / host kernel: x86_64 / 6.18.54.1-microsoft-standard-WSL2
Snippet identity / locale: uid=65534, gid=65534 (unprivileged) / C.UTF-8
Interpreter invocation: dotnet build --no-restore && dotnet out/csharp.dll
Container image ID: sha256:32dc2d998158b6554c99b73b533f423696a0f3e31e8cbea9db10b5eee9a2fadd
Code SHA-256: d991d7e05552d12d287718c34e2cf2780b1028eb8857f981f0aab9aba548eafc
Dependencies: libc6 2.39-0ubuntu8.9

Test input setup

These are the prepared inputs used by the test harness. See Details above for the prerequisites and how to run this example.

# No input files required.

Observed standard output

urgent

Exit code: 0. Standard error: empty. Validation: Exact stdout comparison. System-dependent values above are one recorded run.