C# Language Tutorial => Usage with non-default constructors

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Example

You can combine object initializers with constructors to initialize types if necessary. Take for example a class defined as such:

public class Book {
    public string Title { get; set; }
    public string Author { get; set; }

    public Book(int id) {
        //do things
    }

    // the rest of class definition
}

var someBook = new Book(16) { Title = "Don Quixote", Author = "Miguel de Cervantes" }

This will first instantiate a Book with the Book(int) constructor, then set each property in the initializer. It is equivalent to:

var someBook = new Book(16);
someBook.Title = "Don Quixote";
someBook.Author = "Miguel de Cervantes";

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