ClearDb.cs

private void ClearDb(IGraphClient client)
{
    client.Cypher
        .Match("(n)")
        .DetachDelete("n")
        .ExecuteWithoutResults();
}

CreatePerson.cs

private void CreatePerson(IGraphClient client, params Person[] persons)
{
    client.Cypher
        .Unwind(persons, "person")
        .Merge("(p:Person { Id: person.Id })")
        .OnCreate()
        .Set("p = person")
        .ExecuteWithoutResults();
}

CreateUniqueRelationship.cs

private void CreateUniqueRelationship(int person1Id, int person2Id, string relType, bool twoWay, GraphClient client)
{
    var query = client.Cypher
        .Match("(p1:Person)", "(p2:Person)")
        .Where((Person p1) => p1.Id == person1Id)
        .AndWhere((Person p2) => p2.Id == person2Id)
        .CreateUnique("(p1)-[:" + relType + "]->(p2)");
        
    if(twoWay)
        query = query.CreateUnique("(p1)<-[:" + relType + "]-(p2)");
        
    query.ExecuteWithoutResults();
}

FamilyTree.cs

var query = client.Cypher
    .Match("(p:Person {Id:{id}})")
    .WithParams(new { id = 2 })
    .OptionalMatch("(p)-[r]->(p2:Person)")
    .With("p, {Relationship: type(r), Relative: p2} as relations")
    .Return((p, relations) => new PersonData
    {
        Person = p.As<Person>(),
        Relations = relations.CollectAs<Relation>()
    });

var result = query.Results;

GetAllPersons.cs

var people = client.Cypher
      .Match("(p:Person)")
      .Return(p => p.As<Person>())
      .Results;

Neo4j3.0.Net.cs

var client = new GraphClient(new Uri("http://localhost:7474/db/data"), "neo4j", "myPa55w0rd");
client.Connect();
// clear database
ClearDb(client);

var father = new Person { Id = 1, Name = "Paul", Age = 45};
var mother = new Person { Id = 2, Name = "Julia", Age = 43 };
var son = new Person { Id = 3, Name = "Hugo", Age = 5 };
var daughter = new Person { Id = 4, Name = "Mary", Age = 7 };
CreatePerson(client, father, mother, son, daughter);

CreateUniqueRelationship(father.Id, mother.Id, "MARRIED_TO", true, client);
CreateUniqueRelationship(father.Id, son.Id, "PARENT_OF", false, client);
CreateUniqueRelationship(father.Id, daughter.Id, "PARENT_OF", false, client);
CreateUniqueRelationship(mother.Id, son.Id, "PARENT_OF", false, client);
CreateUniqueRelationship(mother.Id, daughter.Id, "PARENT_OF", false, client);
CreateUniqueRelationship(son.Id, father.Id, "CHILD_OF", false, client);
CreateUniqueRelationship(son.Id, mother.Id, "CHILD_OF", false, client);
CreateUniqueRelationship(daughter.Id, father.Id, "CHILD_OF", false, client);
CreateUniqueRelationship(daughter.Id, mother.Id, "CHILD_OF", false, client);

Person.cs

public class Person
{
    public int Id { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
}

PersonData.cs

public class PersonData
{
    public Person Person { get; set; }
    public IEnumerable<Relation> Relations { get; set; }
}

Relation.cs

public class Relation
{
    public Person Relative {get; set;}
    public string Relationship { get; set; }
}