c# - linq 查询的等效 lambda 语法

Question

我脑子里一片空白，但我似乎找不到 - 的等效 lambda 语法

string[] a = {"a","b","c"}; 
string[] b = {"1","2","3"}; 

var x = from a1 in a
        from b1 in b
        select new{a1, b1};

Answer 1

var x = a.SelectMany(a1=>b.Select(b1=>new {a1,b1}));