public class Thing
{
    [ODataPropertyName("title")]
    public string Title { get; set; }

    [ODataPropertyName("id")]
    public string Id { get; set; }
}

var query = new ODataQueryBuilder()
    .For<Thing>("Things")
    .ByList()
    // expected: title,id
    // actual: Title,Id
    .Select(x => new { x.Title, x.Id });
    // allow multiple select as a solution?
    //.Select(x => x.Title)
    //.Select(x => x.Id)
    // or introduce another approach for selecting several columns?

var parts = query.ToDictionary();