Must supply valid C# code, ideally just classes and structs that expose public properties (methods, statics, and any other application code will be ignored).
If a class references other object types, include those dependency classes or enums too.
If you want your JSON to be populated with sample data, initialize those properties directly (without getters and setters) or create a default constructor and set them there.
Commonly used namespaces (System.Collections.Generic, System.Linq, etc) are automatically included; however, for less commonly used .NET Framework types you may add those namespaces. Example: to use the type IPAddress include "Using System.Net;".
If it doesn't compile in Visual Studio it won't compile here.
See the example below and click the button to try it out.
Note: This tool is intended to consume reasonably simple C# class hierarchies that have no dependencies on external libraries. Anything too complex may generate errors.