将iDictionary <tkey，tvalue>转换为IDictionary <tsomeproperty，icollection <tvalue =“”>＆gt;

Question

我有IDictionary<TKey, TValue>以TKey哈希引用我的项目。

我怎样按}的结果分组？结果将适合EquivalenceClass TKey.GetEquivalenceClass()

一个更具体的例子，可能是：给定

IDictionary<EquivalenceClass, ICollection<TValue>>

转

public enum PlayerPositionGroup {Attacker, Defender}
public class Player{
  public PlayerPositionGroup GetPositionGroup(){...}
}

到

IDictionary<string, Player> SoccerPlayersByName

Answer 1

这个怎么样：

SoccerPlayersByName
.Values
.GroupBy(v => v.GetPositionGroup())
.ToDictionary(g => g.Key, g => g.ToArray());