https://johnkoerner.com/csharp/the-c-interactive-window-in-v...
Previously there was the Immediate window but it is limited:
https://msdn.microsoft.com/en-us/library/f177hahy%28v=vs.110...
btw, see the section here on "Blub Paradox" (http://www.paulgraham.com/avg.html ) which means I'm not really competent to comment of C#'s dynamic objects.
It seems C# work by subclassing the DynamicObject class. What about dynamically extending all the other existing C# classes?
What if I subclassed a C# Queue as MyQueue and then while my days long simulation was running I wanted add an instance variable 'trackCount' to all existing MyQueue instances? In Pharo all you do is this...
Queue subclass: #MyQueue instanceVariableNames: ’trackCount’ classVariableNames: ’’ poolDictionaries: ’’ category: ’Example’
and program keeps running, this definition is updated in the editor.