c# – 如何让ToDictionary在F#中工作？

int[] values = new int[]
{
    1,2,3,5,7
};

Dictionary<int,string> dictionary = 
           values.ToDictionary(key => key,val => (val % 2 == 1) ? "Odd" : "Even");

// display all keys and values.
foreach (keyvaluePair<int,string> pair in dictionary)
{
    Console.WriteLine(pair);
}

输出是：

[1,Odd]
[2,Even]
[3,Odd]
[5,Odd]
[7,Odd]

我希望在F#中使用ToDictionary类似地执行此操作,并且到目前为止这样做：

let values = [| 1; 2; 3; 5; 7 |]

let dictionary = values.ToDictionary( ??? )

// display all keys and values.
for d in dictionary do
    printfn "%d %s" d.Key d.Value

但是我如何在ToDictionary中编写逻辑？