c# - ExpandoObject quirky behavior while adding items dynamically -

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so i'm using expandoobject add properties dynamically populated string. going use these bind datagrid later. given below 2 variations of code, doing same thing (to me atleast) 1 fails , 1 doesn't. can me understand why is?

failed code

    dynamic dynamo = new expandoobject() idictionary<string,object>;     string words[] = basestring.split('|');     foreach(string word in words)    {         dynamo[word] = word.toupperinvariant();    }

successful code

 dynamic dynamo = new expandoobject();  var dynamoose = dynamo as idictionary<string,object>; //notice cast  string words[] = basestring.split('|');  foreach(string word in words) {    dynamoose[word] = word.toupperinvariant(); }

`

your code doesn't run directly. couldn't double cast work. , string words[] didn't compile, changed string[] words.

from there on failing code gave me valuable info:

additional information: cannot apply indexing [] expression of type 'system.dynamic.expandoobject'

your second piece of code works, because have instance of idictionary while failing piece tries call []-indexing operator on dynamic.


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