Raven.Migrations.Migration1.Up C# (CSharp) Method

        public void Up(IDocumentSession session)
        {
            session.Advanced.DatabaseCommands.PutIndex<Book, Book>("BooksByTitle", new Client.Indexes.IndexDefinition<Book, Book>
            {
                Map = books => from b in books
                               select new { b.Title }
            });
        }