What is Dynamic Language Runtime (DLR)?

Dynamic Language Runtime(DLR) is a runtime environment that adds set of services for dynamic languages to the Common Language Runtime.

The difference between dynamic languages and statically typed languages such as C# and Visual Basic is that you need to specify the object type at design time for the latter.

There are a lot of popular dynamic languages such as the following:

LISP
SmallTalk
Javascript
PHP
Ruby
Python
ColdFusion, Lua
Cobra and
Groovy

Dynamic languages are also excellent scripting languages used in designing Web sites; data transformations; artificial intelligence, etc.

The main driver for DLR is to create the ability to run the dynamic languages on top of the CLR. Dynamic objects (in System.dynamic) now can be used in C# and Visual Basic. This in Visual studio Community 2017.

DLR_0
Here is the architecture of DLR for IronPython and IronRuby from Microsoft documentation in MSDN.

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