winforms - Can't retrieve values from OrderedDictionary -

        ordereddictionary ordered = new ordereddictionary();         ordered.add('a', "something");         ordered.add('b', "someone");         ordered.add('c', "somewhere");           foreach (char character in ordered.keys)         {             messagebox.show(ordered[character].tostring());         }  

i cannot items key. code throws

index out of range. must non-negative , less size of collection.

it takes char 'a' 97 integer value , tries value index reason this?

if use object in loop ınstead works. why?

      foreach (object character in ordered.keys)         {              messagebox.show(ordered[character].tostring());          }      

ordereddictionary has 2 overloads indexer: 1 take int index , other takes object.

c# trying convert char type fit 1 of overloads , 1 choosing convert char int (because compiler sees "easier" do) , makes assumption accessing index. solution explicit:

ordered[(object)character].tostring());