public static IMultikeyedDictionary <TKey2, TKey3, TValue> FilterToDictionary <TKey1, TKey2, TKey3, TValue>(this IMultikeyedDictionary <TKey1, TKey2, TKey3, TValue> dict, TKey1 key1Filter)
{
var result = new MultikeyedDictionary <TKey2, TKey3, TValue>();
foreach (var ksvp in dict.Filter(key1Filter))
{
result.Add(ksvp.Keys.Key2, ksvp.Keys.Key3, ksvp.Value);
}
return(result);
}
public static IMultikeyedDictionary <TKey1, TKey2, TValue> ToDictionary <T, TKey1, TKey2, TValue>(this IEnumerable <T> series, Func <T, TKey1> key1Selector, Func <T, TKey2> key2Selector, Func <T, TValue> valueSelector)
{
MultikeyedDictionary <TKey1, TKey2, TValue> result = new MultikeyedDictionary <TKey1, TKey2, TValue>();
foreach (var element in series)
{
result.Add(key1Selector(element), key2Selector(element), valueSelector(element));
}
return(result);
}