嵌套字典LINQ中的过滤器元素

var nestedDict = new Dictionary<string, Dictionary<string, int>>
{
    { "A", new Dictionary<string, int> { { "X", 1 }, { "Y", 2 } } },
    { "B", new Dictionary<string, int> { { "X", 3 }, { "Y", 4 } } },
    { "C", new Dictionary<string, int> { { "X", 5 }, { "Y", 6 } } }
};

var filteredDict = from outer in nestedDict
                   where outer.Key == "A" || outer.Key == "B"
                   select outer;

foreach (var outer in filteredDict)
{
    Console.WriteLine($"Outer Key: {outer.Key}");
    foreach (var inner in outer.Value)
    {
        Console.WriteLine($"Inner Key: {inner.Key}, Value: {inner.Value}");
    }
}

Outer Key: A
Inner Key: X, Value: 1
Inner Key: Y, Value: 2
Outer Key: B
Inner Key: X, Value: 3
Inner Key: Y, Value: 4

var nestedDict = new Dictionary<string, Dictionary<string, int>>
{
    { "A", new Dictionary<string, int> { { "X", 1 }, { "Y", 2 } } },
    { "B", new Dictionary<string, int> { { "X", 3 }, { "Y", 4 } } },
    { "C", new Dictionary<string, int> { { "X", 5 }, { "Y", 6 } } }
};

var filteredDict = nestedDict.Where(outer => outer.Key == "A" || outer.Key == "B");

foreach (var outer in filteredDict)
{
    Console.WriteLine($"Outer Key: {outer.Key}");
    foreach (var inner in outer.Value)
    {
        Console.WriteLine($"Inner Key: {inner.Key}, Value: {inner.Value}");
    }
}