IFulltextQuery<TDocument> Options(
	Action<IFulltextQueryOptions<TDocument>> optionSetter
)

Function Options ( 
	optionSetter As Action(Of IFulltextQueryOptions(Of TDocument))
) As IFulltextQuery(Of TDocument)

public class Product
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
    public decimal Price { get; set; }
    public int CategoryId { get; set; }
    public int VendorId { get; set; }
    public int Weight { get; set; }
}

using (IFulltextSession fulltextSession = fulltextStore.StartSession())
{
    var results = fulltextSession.Query<Product>().
                                  Match("a product").
                                  Options(o => o.FieldWeight(x => x.Name, 1000).
                                                 MaxMatches(50)).
                                  ToList();
}