static T Create <T, P>(P value)
{
if (typeof(T).Equals(typeof(FamilyMember)) && typeof(P).Equals(typeof(FamilyRelation)))
{
FamilyRelation rel = Identity <FamilyRelation, P> .Cast(value);
return((T)(object)new FamilyMember(rel));
}
throw new NotImplementedException();
}
public void Cast_returns_appropriate_identity()
{
var identity = new Identity <long, Animal>(5);
Assert.That(() => Identity.Cast <Cat>(identity).Value, Is.EqualTo(5));
}