// add, will except if Key:Generation already exists
public void Add(TKey key, TValue value)
{
if (!dictionary.ContainsKey(key))
{
dictionary[key] = new DictionaryWithFirstLastKey <uint, TValue>();
}
dictionary[key].Add(Generation, value);
UpdatesAtThisGeneration++;
}
// set key to value at this generation
public TValue this[TKey key] {
set
{
if (!dictionary.ContainsKey(key))
{
dictionary[key] = new DictionaryWithFirstLastKey <uint, TValue>();
}
dictionary[key][Generation] = value;
UpdatesAtThisGeneration++;
}
}