eulerfx

<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom"> 
	<title>Example Feed</title>
	<subtitle>A subtitle.</subtitle>
	<link href="http://example.org/feed/" rel="self" />
	<id>urn:uuid:60a76c80-d399-11d9-b91C-0003939e0af6</id>
	<updated>2003-12-13T18:30:02Z</updated>
	<author>
		<name>John Doe</name>
		<email>johndoe@example.com</email>

eulerfx

public static Func<T> Retry(Func<T> original, int retryCount)
{
    return () =>
    {
        while (true)
        {
            try
            {
                return original();
            }

eulerfx

/// <summary>
    /// Utility methods for <see cref="System.Threading.Tasks.Task"/>.
    /// </summary>
    public static class TaskHelper
    {
        /// <summary>
        /// Returns a task which retries the task returned by the specified task provider.
        /// </summary>
        /// <typeparam name="TResult"></typeparam>
        /// <param name="taskProvider">The task returning function.</param>

eulerfx

    // A repository.
    public interface IPurchaseOrderRepository
    {
        PurchaseOrder Get(string id);
        // The commit method would likely be moved to a Unit of Work managed by infrastructure.
        void Commit();
    }

    // A marker interface for a domain event.
    public interface IDomainEvent { }

eulerfx

public class Order
{
  public string Id { get; private set; }
  public string Number { get; private set; }
  public string CustomerId { get; private set; }
  public DateTime Date { get; private set; }
  public ICollection<OrderLineItem> Items { get; private set; }
  public decimal ShippingCharge { get; private set; }
  public decimal TaxCharge { get; private set; }
  public decimal Total

eulerfx

public interface IOrderRepository
{
  Order Get(string Id);
  IList<Order> GetMostRecent(string customerId, int max = 20);
  void Add(Order order);
  void Remove(string Id);
}

eulerfx

select top(@max) 
  Id,
  OrderNumber,
  Date,
  Total = o.TaxCharge + o.ShippingCharge + (select sum(i.Amount * i.Quantity) from OrderLineItems i where i.OrderId = o.Id)
from Orders o
where o.CustomerId = @customerId
order by o.Date desc

eulerfx

public OrderReadModel
{
  public string Id { get; private set; }
  public string OrderNumber { get; private set; }
  public DateTime Date { get; private set; }
  public decimal Total { get; private set; }
} 

eulerfx

public class UserProfile
{
    public UserProfile(string name)
    {
      this.Name = name;
    }

    public string Name
    {
      get { return _name; }

eulerfx

public class UserProfile
{
    public string Name { get; set; }
    // implementation omitted
    public bool IsValid { get; }
}

var profile = new UserProfile();
// must query to ascertain validity
if (!profile.IsValid)