Sl4vP0weR

using System;
using System.Runtime.CompilerServices;

// our code
MyType obj = new();
MyExtension ext = (MyExtension)obj;
ext.MyField = 42;

// other code
ext = (MyExtension)obj;

Sl4vP0weR

public sealed class SequenceEqualityComparer<T> : IEqualityComparer<IEnumerable<T>>
{
    public readonly IEqualityComparer<T> Comparer;

    public SequenceEqualityComparer(IEqualityComparer<T>? comparer = null)
    {
        Comparer = comparer ?? EqualityComparer<T>.Default;
    }

    public static readonly SequenceEqualityComparer<T> Instance = new();

Sl4vP0weR

function inprint(table)
  print(table)
  for key, value in pairs(table) do
      print('\t['..key..'] = ['..value..']')
  end 
end

Sl4vP0weR

public static string? CapitalizeFirstLetter(this string? text)
{
    if (string.IsNullOrWhiteSpace(text)) return text;

    StringBuilder result = new(text);

    var length = text!.Length;
    for (var i = 0; i < length; i++)
    {
        var c = text[i];

Sl4vP0weR

using System;
using System.Globalization;

public enum Language : int
{
    Arabic = 1,
    German = 7,
    English = 9,
    Spanish = 10,
    French = 12,

Sl4vP0weR

using System;
using System.Linq;
using System.Collections.Generic;

/// <summary>
/// Enum extensions.
/// </summary>
public static class EnumExtensions
{
    /// <inheritdoc cref="EnumExtensions{TEnum}.Values"/>

Sl4vP0weR

public class ConditionalWeakDictionary<TKey, TValue> : IDictionary<TKey, TValue>
    where TKey : class
    where TValue : class
{
    private readonly ConditionalWeakTable<TKey, TValue> table = new();

    public TValue this[TKey key]
    {
        get => Get(key);
        set => Set(key, value);

Sl4vP0weR

/// <summary>
/// <see cref="List{T}"/> with functionality of <see cref="Queue{T}"/> that allows to enqueue elements in order using <see cref="Comparison{T}"/>.
/// </summary>
/// <typeparam name="T">Type of elements.</typeparam>
public class OrderedQueue<T> : List<T>
{
    public OrderedQueue(Comparison<T> comparison = null)
    {
        OrderComparison = comparison ?? ((a, b) => a.Equals(b) ? 0 : -1);
    }

Sl4vP0weR

/// <summary>
/// Creates new <see cref="LinkedList{T}"/> with reversed nodes.
/// </summary>
/// <typeparam name="T"></typeparam>
public static LinkedList<T> Reverse<T>(this LinkedList<T> originalList)
{
    var reversedList = new LinkedList<T>();
    var last = originalList.Last;
    reversedList.AddFirst(last.Value);
    while ((last = last.Previous) is not null)

Sl4vP0weR

using System;
using System.Threading.Tasks;

public static class TaskExtensions
{
    public delegate void ExceptionCallback(Exception exception);
    public delegate void CompleteCallback<in T>(T result);
    public delegate void CompleteCallback();
    
    public static Task<T> WithResult<T>(this Task task, Func<Task, T> func) =>