Question

Consider the following . . .

Dictionary<string, Dictionary<string, int>> myData;

I would like to keep only the outer entries where the inner int > 1.

myData= myData.Select(c => c.Value.Where(i => i.Value > 1));

. . . throws a conversion error.

Thanks.

EDIT

The answer @Saeed gave is doing great, but however I now need something additional. I need the outer Dictionary to only contain entries where the inner Dictionary has more than 1 entry. (Every time I think I’ve got it, I don’t. And I’m sure it something I should be seeing!)

Answer 1

You should cast it to dictionary, Also you can simply use anonymous type instead of its exact type.

myData= myData
             .Select(c => new {Key = c.Key,
                           Value = c.Value
                           .Where(i => i.Value > 1)
                           .ToDictionary(y=>y.Key, y=>y.Value)})
             .ToDictionary(x=>x.Key, x=>x.Value);

Update: After doing this, for your additional requirement do:

myData = myData.Where(x=>x.Value.Count() > 1).ToDictionary(x=>x.Key,x=>x.Value);