Sort dictionary based on 2 factors

Question

I have a dictionary, it's key is a string, and the value is a list of objects. I want to sort its keys based on 2 factors, the size of the list, and the object Id. The values are sorted so the first element in the list is always the lowest id.

So far I managed to use order by to sort it by the number of elements in the list, but now I am having a hard time sorting based on the other factor.

Example: Dictionary X contains current keys/values

["A",{2,4,5,6}]
["B",{6}]   
["C",{1}]
["D",{0,1}]   
["E",{0,99,88,66}]

After sorting it should be

["E",{0,99,88,66}]
["A",{2,4,5,6}]    
["D",{0,1}]
["C",{1}]   
["B",{6}]

Here is what I have:

Public MyObject{
  public Int Id{ get; set;}
}

var dictionary = new Dictionary<string, List<MyObject>>();
var dictionarySortedByCount = dictionary.OrderBy(x => x.Value.Count).Reverse().ToDictionary(x => x.Key, x => x.Value);

Any help would be appreciated.

Answer 1

Have you tried adding another order condition after the first one like below ?

var dictionarySortedByCount = dictionary
        .OrderByDescending(x => x.Value.Count)
        .ThenBy(x => x.Value[0].ObjectId)
        .ToDictionary(x => x.Key, x => x.Value);