get the key of the highest value of a Dictionary in C# where value may be null

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suppose I have a

C#

Dictionary<string,double> results

I need to get the key of the highest value of a Dictionary in C#, from

(http://stackoverflow.com/questions/2805703/good-way-to-get-the-key-of-the-highest-value-of-a-dictionary-in-c-sharp[^]

I have:

C#

var max = results.Aggregate((l, r) => l.Value > r.Value ? l : r).Key;

How should I change the syntax to manage also the case in which the dictionary can contain null value. (if null, I do not want to consider that associated key, just skip that key)

Thanks

Posted 11-Jul-13 10:50am

PozzaVecia

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**Zoltán Zörgő** · Accepted Answer · 2013-07-11T11:19:00

Solution 1

What about this:

C#

Dictionary<string,double?> results = new Dictionary<string,double?>(){
    {"A", 12.0},
    {"B", 10.0},
    {"C", null},
    {"D", 15.0},
    {"E", 5.0}
};

var max = from x in results where x.Value == results.Max(v => v.Value) select x.Key;

max.Dump();

Posted 11-Jul-13 11:19am

Zoltán Zörgő