How to insert as first element in dictionary?

Question

I have a dictionary structure, with multiple key value pairs inside.

myDict.Add(key1, value1);
myDict.Add(key2, value2);
myDict.Add(key3, value3);
         


        

Answer 1

From the MSDN page on Dictionary(TKey, TValue):

For purposes of enumeration, each item in the dictionary is treated as a KeyValuePair<(Of <(TKey, TValue>)>) structure representing a value and its key. The order in which the items are returned is undefined.

I'm assuming you can't use SortedDictionary because the control depends on your data source being a Dictionary. If the control expects both the Dictionary type and sorted data, the control needs to be modified, because those two criteria contradict each other. You must use a different datatype if you need sorting/ordering functionality. Depending on undefined behavior is asking for trouble.