traversal.cs

public static async Task<List<Person>> GetAncestors(Person vertex, IGremlinQuerySour
{
    var ancestors = await querySource.V<Person>(vertex.Id)
        .Out<ChildOf>()
        .Cast<Person>()
        .ToArrayAsync();
    if (ancestors.Count() == 0)
    {
        return ancestors.ToList();
    }
    var ancestorsReturn = new List<Person>(ancestors);
    foreach (var ancestor in ancestors)
    {
        ancestorsReturn.AddRange(await GetAncestors(ancestor, querySource));
    }
    return ancestorsReturn;
}