class Program
    {
        static void Main(string[] args)
        {
            var store = DocumentStore.For("host=bla...");
            store.Options.UpdateBatchSize = 10;

            var list = Enumerable.Range(0, 100)
                .Select(x => new TestClass
                {
                    Id = Guid.NewGuid().ToString()
                })
                .ToList();

            using(var session = store.LightweightSession())
            {
                session.DeleteWhere<TestClass>(x => x.Id != null);
                list.ForEach(p => session.Store(p));
                session.SaveChanges();
            }

            Console.WriteLine("Done");
        }
    }

    public class TestClass
    {
        public string Id { get; set; }
    }