Get keys from IList <IDictionary <string, object >>

Question

I have

IList<IDictionary<string, object>> 

How to get without duplicate keys from all dictionaries inside this IListand put them in IList<string>using LINQ?

Answer 1

Use SelectManyandDistinct

List<string> uniquekeys = listOfDictionaries
    .SelectMany(d => d.Keys)
    .Distinct()
    .ToList();