how to fetch data from nested Dictionary in c#

Question

I need to fetch data from nested Dictionary IN C#. My Dictionary is like this:

static Dictionary<string, Dictionary<ulong, string>> allOffset = 
  new Dictionary<string, Dictionary<ulong, string>>();

I need to fetch all keys/values of the full dictionary, represented like so:

string->>ulong, string

Thanks in advance.

Answer 1

A LINQ answer (that reads all the triples):

var qry = from outer in allOffset
          from inner in outer.Value
          select new {OuterKey = outer.Key,InnerKey = inner.Key,inner.Value};

or (to get the string directly):

var qry = from outer in allOffset
          from inner in outer.Value
          select outer.Key + "->>" + inner.Key + ", " + inner.Value;

foreach(string s in qry) { // show them
    Console.WriteLine(s);
}

Answer 2

Or One line solution

allOffset.SelectMany(n => n.Value.Select(o => n.Key+"->>"+o.Key+","+ o.Value))
         .ToList()
         .ForEach(Console.WriteLine);