Add property to ExpandoObject with the same name as a string

Question

Is there a way to add a property to an ExpandoObject with the same name as a string value?

For example, if I have:

string propName = \"ProductNumber\";
d         


        

Answer 1

Cast the ExpandoObject to an IDictionary<string,object> to do this:

string propName = "ProductNumber";
dynamic obj = new System.Dynamic.ExpandoObject();
var dict = (IDictionary<string,object>)obj;
dict[propName] = 123;

Answer 2

ExpandoObject implements IDictionary<string, object>:

((IDictionary<string, object>)obj)[propName] = propValue

I don't know off the top of my head whether you can use the indexer syntax with a dynamic reference (i.e., without the cast), but you can certainly try it and find out.