创建linq扩展方法，该方法接受属性和函数，并在该属性上执行该函数

public static class LinqExtensions
{
    public static IEnumerable<T> ExecuteOn<T, TResult>(this IEnumerable<T> collection, Func<T, TResult> function)
    {
        foreach (var item in collection)
        {
            function(item);
            yield return item;
        }
    }
}

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

// 使用 LINQ 扩展方法
var persons = new List<Person>
{
    new Person { Name = "Alice", Age = 25 },
    new Person { Name = "Bob", Age = 30 },
    new Person { Name = "Charlie", Age = 35 }
};

var result = persons.ExecuteOn(p => Console.WriteLine($"{p.Name} is {p.Age} years old."))
                   .Where(p => p.Age >= 30)
                   .Select(p => p.Name);

foreach (var name in result)
{
    Console.WriteLine(name);
}