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c#dictionaryexcepttake

Take n element except from dictionary

I have this code: 

var items = from pair in dic orderby pair.Value descending select pair;
var top5 = items.Take(5);

I take five items from a Dictionary string,int in descending order

var keys = String.Join(", ", top5.Select(x => String.Format("{0}", x.Key)).ToArray().Except(res.Keys));

Here I show the 5 items but I except some words placed in another Dictionary string, string. If I except one word in the top5 I will display less than 5 elements.

How can I display always 5 elements although I except some words?

Solution 
  • var items = from pair in dic orderby pair.Value descending select pair;
var keys = items.Select(x => String.Format("{0}", x.Key)).ToArray().Except(res.Keys);
var top5 = keys.Take(5);
var result = String.Join(", ", top5);

    Do the .Take after you've done the exclusion. And then do the formatting. You can combine some of these into one linq statement.