Answer to closed SO question https://stackoverflow.com/questions/55203279/c-sharp-coding-assessment-need-help-understanding-specs?noredirect=1#comment97143784_55203279

Program.cs

// https://stackoverflow.com/questions/55203279/c-sharp-coding-assessment-need-help-understanding-specs
using System;

public interface INotification
{
	void Send(string message, object payLoad);
}

public class Email : INotification
{
	string _message { get; set; }
	object _payLoad { get; set; }

	public void Send(string message, object payLoad)
	{
		_message = message;
		_payLoad = payLoad;
		Console.WriteLine($"message \"{message}\" sent by {this.GetType()}");
	}
}

public class Fax : INotification
{
	string _message { get; set; }
	object _payLoad { get; set; }

	public void Send(string message, object payLoad)
	{
		_message = message;
		_payLoad = payLoad;
		Console.WriteLine($"message \"{message}\" sent by {this.GetType()}");
	}

}

public class Report : INotification
{
	string _message { get; set; }
	object _payLoad { get; set; }

	public void Send(string message, object payLoad)
	{
		_message = message;
		_payLoad = payLoad;
		Console.WriteLine($"message \"{message}\" sent by {this.GetType()}");
	}

}

// EDI GENERATOR
public class EdiGenerator
{

	public void Generate(string[] configurationData)
	{
		foreach (string notificatorType in configurationData)
		{
			// https://stackoverflow.com/questions/11107536/convert-string-to-type-in-c-sharp
			Type type = Type.GetType(notificatorType, true);
			INotification sender = (INotification)Activator.CreateInstance(type);
			sender.Send("this is message to send", new object());
		}
	}

}

public static class MainClass
{

	public static void Main(string[] args)
	{


		EdiGenerator generator = new EdiGenerator();
		//"Report, ConsoleApp3, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",
		//	"Fax, ConsoleApp3, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",
		//	"EMail, ConsoleApp3, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",

		// notificators should contains Type names of notificators
		string[] notificators = new string[]
		{
			"Report",
			"Fax",
			"Email",
		};

		generator.Generate(notificators);
	}


}

Depends on yours preferences. I was taken into account the parameters string[] configurationData, which does not allow many other solution.

But you can:

• Inject a factory to a generator for creating classes which are not known in time of compilation.
• Resolve a class from dependency container in generator. For example register all INotification instances in DI container and resolve all registered instances in generator. Depends of concrete DI container.