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 { }

haacked

public static class TestHelpers
{
    public static void ShouldEqualWithDiff(this string actualValue, string expectedValue)
    {
        ShouldEqualWithDiff(actualValue, expectedValue, DiffStyle.Full, Console.Out);
    }

    public static void ShouldEqualWithDiff(this string actualValue, string expectedValue, DiffStyle diffStyle)
    {
        ShouldEqualWithDiff(actualValue, expectedValue, diffStyle, Console.Out);