Create custom views of managed objects (C#, Visual Basic, F#, C++/CLI)
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
You can customize the way Visual Studio displays data types in debugger variable windows.
Attributes
In C#, Visual Basic, F#, and C++ (C++/CLI code only), you can add expansions for custom data using DebuggerTypeProxyAttribute, DebuggerDisplayAttribute, and DebuggerBrowsableAttribute.
In .NET Framework 2.0 code, Visual Basic does not support the DebuggerBrowsable attribute. This limitation is removed in more recent versions of .NET.
Visualizers
You can write a visualizer to display any managed data type. For more information, see How to: Write a Visualizer.
Note
For C++ code, you can add custom data type expansions using the Natvis framework, as described in Create custom views of C++ objects in the debugger.