I'm attempting to test whether an ExpandoObject contains a given key. The object is created, the key added, and then removed. Using the IDictionary.ContainsKey method returns false, but using ...

The xref:System.Dynamic.ExpandoObject class enables you to add and delete members of its instances at run time and also to set and get values of these members. This class supports dynamic binding, ...

In an earlier column I discussed the basics of working with ExpandoObjects (including how to add methods to an ExpandoObject). As I said in that column, there's nothing stopping you from building an ...

You can give your users the ability to store any data they want, including stuff they make up at run time, by using an ExpandoObject. In fact, when you don't know what your data is until run time (and ...