Dynamically adding properties to a dynamic object?

Question

i have this

dynamic d = new ExpandoObject();
d.Name = attribute.QualifiedName.Name;

so , i know that d will have a property Name. Now if i

Answer 1

dynamic d = new ExpandoObject();
((IDictionary<string,object>)d)["test"] = 1;
//now you have d.test = 1

Answer 2

Here is a cleaner way

var myObject = new ExpandoObject() as IDictionary<string, Object>; myObject.Add("Country", "Ireland");

Answer 3

You can also do like this:-

Dictionary<string,object> coll = new Dictionary<string,object>();
    coll.Add("Prop1","hello");
    coll.Add("Prop2",1);
    System.Dynamic.ExpandoObject obj = dic.Expando();

//You can have this ext method to better help

public static ExpandoObject Expando(this IEnumerable<KeyValuePair<string, object>> 
dictionary)
        {
            var expando = new ExpandoObject();
            var expandoDic = (IDictionary<string, object>)expando;
            foreach (var item in dictionary)
            {
                expandoDic.Add(item);
            }
            return expando;
        }