The ExpandoObject Class

Create objects that can dynamically extend throughout the program execution.

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Introduction

One of the most interesting features of the DLR resides in the System.Dynamic namespace: the ExpandoObject class. This type lets us create dynamic objects that can extend while the program is running. For instance, we could add a method or some other member at runtime. The System.Dynamic namespace brings JavaScript-like capabilities to .NET.

Syntax

The ExpandoObject class is instantiated just like any other type:

dynamic car = new ExpandoObject();

What makes it different from other classes is that we can define new members at runtime:

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