static void Delete(IContactRepo repo)
{
var contact = new Contact
{
FirstName = "Viktor",
LastName = "Prykhidko",
Email = "*****@*****.**",
Company = "xyz",
Title = "Dev"
};
repo.Add(contact);
var c = repo.Find(contact.Id);
repo.Remove(c.Id);
c = repo.Find(contact.Id);
Debug.Assert(c == null);
Console.WriteLine("Deleted");
}