christiannagel

  public class Gadget
  {
    public Gadget(int id, string name)
    {
      this.Id = id;
      this.Name = name;
    }

    public int Id { get; }
    public string Name { get; }

christiannagel

  public class Gadget
  {
    public Gadget(int id, string name)
    {
      this.id = id;
      this.name = name;
    }

    private readonly int id;
    public int Id

christiannagel

using static System.Console;

class Program
{
  public void Main()
  {
    WriteLine("Hello, World!");
  }
}

christiannagel

private static void UsingSimpleArrays()
{
    Console.WriteLine(nameof(UsingSimpleArrays));
    for (int i = 0; i < 20; i++)
    {
        LocalUseOfArray(i);
    }
    Console.WriteLine();
    Console.WriteLine();
}

christiannagel

unsafe private static void ShowAddress(string name, int[] item)
{
    fixed (int* addr = item)
    {
        Console.Write($"\t0x{(ulong)addr:X}");
    }
}

christiannagel

private static void UsingSimpleArraysWithGC()
{
    Console.WriteLine(nameof(UsingSimpleArraysWithGC));
    for (int i = 0; i < 20; i++)
    {
        GC.Collect(0);
        LocalUseOfArray(i);
    }
    Console.WriteLine();
    Console.WriteLine();

christiannagel

private static void LocalUseOfSharedPool(int i)
{
    int[] arr = ArrayPool<int>.Shared.Rent(ARRAYSIZE);
    ShowAddress($"simple array {i}", arr);
    FillTheArray(arr);
    UseTheArray(arr);
    ArrayPool<int>.Shared.Return(arr);
}

christiannagel

public static IEnumerable<T> Where<T>(this IEnumerable<T> source, Func<T, bool> predicate)
{
    if (source == null) throw new ArgumentNullException(nameof(source));
    if (predicate == null) throw new ArgumentNullException(nameof(predicate));

    foreach (T item in source)
    {
        if (predicate(item))
        {
            yield return item;

christiannagel

public static IEnumerable<T> Where<T>(this IEnumerable<T> source, Func<T, bool> predicate)
{
    if (source == null) throw new ArgumentNullException(nameof(source));
    if (predicate == null) throw new ArgumentNullException(nameof(predicate));

    return WhereImpl(source, predicate);
}

private static IEnumerable<T> WhereImpl<T>(IEnumerable<T> source, Func<T, bool> predicate)
{

christiannagel

public static IEnumerable<T> Where<T>(this IEnumerable<T> source, Func<T, bool> predicate)
{
    if (source == null) throw new ArgumentNullException(nameof(source));
    if (predicate == null) throw new ArgumentNullException(nameof(predicate));

    return Iterator();

    IEnumerable<T> Iterator()
    {
        foreach (T item in source)