LINQ .ToDictionary for 2d字典

Question

我在下面有3个词典：

Dictionary<string, int> A = new Dictionary<string, int>();
Dictionary<string, int> B = new Dictionary<string, int>();
Dictionary<int, Dictionary<int, int>> C = new Dictionary<int, Dictionary<int, int>>();

我想填写C Dictionary，默认值= 0，如下所示，我的代码不正确，请帮帮我

C = A.ToDictionary(x => x.Value, B.ToDictionary(y => y.Value, y => 0));

Answer 1

C = A.ToDictionary(x => x.Value, v=>B.ToDictionary(y => y.Value, y => 0));