Convert class to dynamic and add properties

Question

I have a class MyClass. I would like to convert this to a dynamic object so I can add a property.

This is what I had hoped for:

dynamic          


        

Answer 1

You cannot add members to class instances on the fly.

But you can use ExpandoObject. Use factory to create new one and initialize it with properties which you have in MyClass:

public static ExpandoObject Create(int id)
{
    dynamic obj = new ExpandoObject();
    obj.Id = id;
    obj.CreatedAt = DateTime.Now;
    // etc
    return obj;
} 

Then you can add new members:

dynamic dto = Factory.Create(id);
dto.newProperty = "123";