using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        var funcs = new List<Func<int>>();

        // Первая группа лямбд
        for (int i = 0; i < 4; i++)
        {
            funcs.Add(() => i * i);
        }

        Console.Write("Squares: ");
        foreach (var f in funcs)
            Console.Write(f() + " ");

        Console.WriteLine();

        // Вторая группа лямбд с копией переменной
        funcs.Clear();
        for (int i = 0; i < 4; i++)
        {
            int j = i;
            funcs.Add(() => j * j);
        }

        Console.Write("SquaresWithCopy: ");
        foreach (var f in funcs)
            Console.Write(f() + " ");
    }
}

$ErrorActionPreference = "Stop"

$rootFolder = Resolve-Path -Path "."
$oldName = "Sample.Foo"
$newName = "Sample.Bar"

# Rename files and folders
foreach ($item in Get-ChildItem -LiteralPath $rootFolder -Recurse | Sort-Object -Property FullName -Descending) {
    $itemNewName = $item.Name.Replace($oldName, $newName)
    if ($item.Name -ne $itemNewName) {
        Rename-Item -LiteralPath $item.FullName -NewName $itemNewName
    }
}

# Replace content in files
foreach ($item in Get-ChildItem -LiteralPath $rootFolder -Recurse -Include "*.cmd", "*.cs", "*.csproj", "*.json", "*.md", "*.proj", "*.props", "*.ps1", "*.sln", "*.slnx", "*.targets", "*.txt", "*.vb", "*.vbproj", "*.xaml", "*.xml", "*.xproj", "*.yml", "*.yaml") {
    $content = Get-Content -LiteralPath $item.FullName
    if ($content) {
        $newContent = $content.Replace($oldName, $newName)
        Set-Content -LiteralPath $item.FullName -Value $newContent
    }
}

using System;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        Console.WriteLine("1");
        var task = FooAsync();
        Console.WriteLine("2");
        await task;
        Console.WriteLine("5");
    }

    static async Task FooAsync()
    {
        Console.WriteLine("3");
        await Task.Delay(100);
        Console.WriteLine("4");
    }
}