LINQ此的foreach

Question

我懷疑有LINQ對於這一點，但我無法弄清楚
selectedKeys是一個HashSet

public IEnumerable<FTSword7bitThesaurus> FTSwordsPlusSelected 
{ 
    get 
    { 
     foreach (FTSword7bit w in FTSWords7bit) 
     { 
      yield return new FTSword7bitThesaurus(this, w, selectedKeys.Contains(w.Key)); 
     } 
     Debug.Write("Done FTSthersarus FTSwordsPlusSelected"); 
    } 
} 

Answer 1

您應該使用Select

return FTSWords7bit.Select(w=> 
        new FTSword7bitThesaurus(this, w, 
              selectedKeys.Contains(w.Key))); 

Answer 2

如何LINQ它需要是？

get 
{ 
    var result = FTSWords7bit 
     .Select(x => new FTSword7bitThesaurus(this, x, selectedKeys.Contains(x.Key)); 
    Debug.Write("Done FTSthersarus FTSwordsPlusSelected"); 
    return result; 
}