How do I get a key from a OrderedDictionary in C# by index?

Question

How do I get the key and value of item from OrderedDictionary by index?

Answer 1

orderedDictionary.Cast<DictionaryEntry>().ElementAt(index); 

Answer 2

There is not a direct built-in way to do this. This is because for an OrderedDictionary the index is the key; if you want the actual key then you need to track it yourself. Probably the most straightforward way is to copy the keys to an indexable collection:

// dict is OrderedDictionary object[] keys = new object[dict.Keys.Count]; dict.Keys.CopyTo(keys, 0); for(int i = 0; i < dict.Keys.Count; i++) {     Console.WriteLine(         "Index = {0}, Key = {1}, Value = {2}",         i,         keys[i],         dict[i]     ); } 

You could encapsulate this behavior into a new class that wraps access to the OrderedDictionary.