Definition of extension points
The definition of the extension point is the same regardless of the implementation method of the DLL method and the script method. See Defining Extension Points.
Specify the C# script file name that will be the entry point for main
as shown below.
{
//Extension definition
"name": "Hello World",
"main": "main.cs", //C# script file name to be the entry point
"lifecycle": "application",
//Extension point definition
//...
}