/// <summary>
/// Selects the projection fields directly from the index
/// </summary>
/// <typeparam name="TProjection">The type of the projection.</typeparam>
public IDocumentQuery <TProjection> SelectFields <TProjection>()
{
var propertyInfos = typeof(TProjection).GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
var projections = propertyInfos.Select(x => x.Name).ToArray();
var fields = propertyInfos.Select(x => DocumentConvention.FindIdentityProperty(x) ? Constants.DocumentIdFieldName : x.Name).ToArray();
return(SelectFields <TProjection>(fields, projections));
}