static void Main(string[] args)
{
var books = BookRepository.GetBooks();
// LINQ Extension Methods
var queriedBooks = books
.Where(book => book.Price < 10)
.OrderBy(book => book.Price);
foreach (var book in queriedBooks)
{
Console.WriteLine(book.Title);
}
// Other methods
// .Single .Min
// .SingleOrDefault .Max
// .OrderBy .Count
// .First .Sum
// .FirstOrDefault .Average
// Last .Skip
// LastOrDefault .Take
Console.WriteLine();
var averageBookPrice = books.Average(book => book.Price);
Console.WriteLine($"Average book price: {averageBookPrice}");
Console.WriteLine();
// LINQ Query Operators
// - gets internally converted to LINQ Extension Methods
// - are a better readable alternative
// - do not support all methods of LINQ Extension Methods
// There is no right or wrong which to use
var queriedBooksAlternative =
from book in books
where book.Price < 10
orderby book.Title
select book;
foreach (var book in queriedBooksAlternative)
{
Console.WriteLine(book.Title);
}
}