Code Maps in Visual Studio 2019 | C# Code Maps Getting Started
You can visualize dependencies across your code by creating a code map. Code maps help you see how the code fits together without reading through files and lines of code.
Visual C# or Visual Basic in a solution or assemblies (.dll or .exe)
Native or managed C or C++ code in Visual C++ projects, header files (.h or #include), or binaries
X++ projects and assemblies made from .NET modules for Microsoft Dynamics AX
To create a code map in Visual Studio, first install the Code Map and Live Dependency Validation components:
Open Visual Studio Installer. You can open it from the Windows Start menu, or within Visual Studio by selecting Tools Get Tools and Features.
Select the Individual components tab.
Scroll down to the Code tools section and select Code Map and Live Dependency Validation.

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