public void Register(Type key, T value)
{
if (key == null)
{
throw ExceptionBuilder.ArgumentNull("key");
}
if (value == null)
{
throw ExceptionBuilder.ArgumentNull("value");
}
if (_typeDictionary.ContainsKey(key))
{
throw ExceptionBuilder.TypeAlreadyRegistered("key", key);
}
_typeDictionary.Add(key, value);
OnChanged();
}