c# - LINQ 根据内部集合值选择

Question

我有这段代码:

public string Label { get; set; }

public bool IsSpoon(out Spoon sp) 
{
    sp = null;
    foreach (Tool t in Tools.GetAllItems())
        if ((sp = t.AllSpoons.FirstOrDefault(x => x.Label == this.Label)) != null)
            break;

    return sp != null;
}

如何通过 LINQ 对其进行优化？

我想到了这样的事情，但这是不允许的:

public string Label { get; set; }

public bool IsSpoon(out Spoon sp) 
{
    return Tools.GetAllItems().FirstOrDefault(x => (sp = x.AllSpoons.FirstOrDefault(y => y.Label == this.Label)) != null) != null;
}

Answer 1

编辑: 我没有注意到 sp 参数，这里有一个更新:

sp = Tools
    .GetAllItems()
    .SelectMany(x => x.AllSpoons)
    .FirstOrDefault(y => y.Label == this.Label);
return sp != null;