Help request for GitHub sample UsingManagedAssemblies

using System;
using System.Windows.Forms;

namespace MyClassLibrary
{
	/// 
	/// The class which will be instantiated from the UIX application.
	/// 
  public class Class1
  {
		public string GetString()
		{
			return "Craig";
		}

		/// 
		/// Shows a message from within the managed assembly.
		/// 
		/// A handle for the parent window (see www.m-files.com/.../index.html
		/// The message to show, which will be prefixed by the vault name.
		/// The M-Files API Vault object (see www.m-files.com/.../index.html
		public void ShowMessage(Int32 parentHWND, string message, dynamic vault)
		{
			// Get a reference to the window from the provided handle.
			IWin32Window parentWindow = Control.FromHandle((IntPtr)parentHWND);

			// Show the message.
			MessageBox.Show(parentWindow, $"{vault.Name} says {message}");
		}
	}
}

// NOTE! This code is for demonstration purposes only and does not contain any kind of
// 		 error handling. MUST be revised before using in production.

"use strict";

function OnNewShellUI( shellUI )
{
	// This is the start point of a ShellUI module.
	
	// Register to be notified when a new normal shell frame (Event_NewNormalShellFrame) is created.
	// We use Event_NewNormalShellFrame rather than Event_NewShellFrame as this won't fire for history (etc.) dialogs.
	// ref: www.m-files.com/.../index.html
	shellUI.Events.Register(
		Event_NewNormalShellFrame,
		handleNewNormalShellFrame );
}

function handleNewNormalShellFrame(shellFrame)
{
	/// Handles the OnNewNormalShellFrame event for an IShellUI.
	/// The shell frame object which was created. 

	// The shell frame was created but it cannot be used yet.
	// The following line would throw an exception ("The object cannot be accessed, because it is not ready."):
	// shellFrame.ShowMessage("A shell frame was created");

	// Register to be notified when the shell frame is started.
	// This time pass a reference to the function to call when the event is fired.
	shellFrame.Events.Register(
		Event_Started,
		getShellFrameStartedHandler(shellFrame) );
}

function getShellFrameStartedHandler(shellFrame)
{
	/// Returns a function that handles the OnStarted event for an IShellFrame.

	return function()
	{
		// The shell frame is now started and can be used.

		// Instantiate the managed object.
		// ref: www.m-files.com/.../index.html
		// In the case below "MyClassLibrary.dll" is the name of the file to load the class from.
		// In this case, the file is loaded from the root of the UIX application.
		// "MyClassLibrary.Class1" is the full class name (including namespace) to instantiate.
		// This class must have an accessible constructor.
		var clrObject = MFiles.CreateObjectCLR( "MyClassLibrary.dll", "MyClassLibrary.Class1" );

		// Call the "ShowMessage" method on the CLR object.
		clrObject.ShowMessage( shellFrame.OuterWindow.Handle, "Hello!" + clrObject.GetString(), shellFrame.ShellUI.Vault );
	};
}

using System;
using System.Windows.Forms;

namespace MyClassLibrary
{
	/// 
	/// The class which will be instantiated from the UIX application.
	/// 
  public class Class1
  {
		public string GetString()
		{
			return "Craig";
		}

		/// 
		/// Shows a message from within the managed assembly.
		/// 
		/// A handle for the parent window (see www.m-files.com/.../index.html
		/// The message to show, which will be prefixed by the vault name.
		/// The M-Files API Vault object (see www.m-files.com/.../index.html
		public void ShowMessage(Int32 parentHWND, string message, dynamic vault)
		{
			// Get a reference to the window from the provided handle.
			IWin32Window parentWindow = Control.FromHandle((IntPtr)parentHWND);

			// Show the message.
			MessageBox.Show(parentWindow, $"{vault.Name} says {message}");
		}
	}
}

// NOTE! This code is for demonstration purposes only and does not contain any kind of
// 		 error handling. MUST be revised before using in production.

"use strict";

function OnNewShellUI( shellUI )
{
	// This is the start point of a ShellUI module.
	
	// Register to be notified when a new normal shell frame (Event_NewNormalShellFrame) is created.
	// We use Event_NewNormalShellFrame rather than Event_NewShellFrame as this won't fire for history (etc.) dialogs.
	// ref: www.m-files.com/.../index.html
	shellUI.Events.Register(
		Event_NewNormalShellFrame,
		handleNewNormalShellFrame );
}

function handleNewNormalShellFrame(shellFrame)
{
	/// Handles the OnNewNormalShellFrame event for an IShellUI.
	/// The shell frame object which was created. 

	// The shell frame was created but it cannot be used yet.
	// The following line would throw an exception ("The object cannot be accessed, because it is not ready."):
	// shellFrame.ShowMessage("A shell frame was created");

	// Register to be notified when the shell frame is started.
	// This time pass a reference to the function to call when the event is fired.
	shellFrame.Events.Register(
		Event_Started,
		getShellFrameStartedHandler(shellFrame) );
}

function getShellFrameStartedHandler(shellFrame)
{
	/// Returns a function that handles the OnStarted event for an IShellFrame.

	return function()
	{
		// The shell frame is now started and can be used.

		// Instantiate the managed object.
		// ref: www.m-files.com/.../index.html
		// In the case below "MyClassLibrary.dll" is the name of the file to load the class from.
		// In this case, the file is loaded from the root of the UIX application.
		// "MyClassLibrary.Class1" is the full class name (including namespace) to instantiate.
		// This class must have an accessible constructor.
		var clrObject = MFiles.CreateObjectCLR( "MyClassLibrary.dll", "MyClassLibrary.Class1" );

		// Call the "ShowMessage" method on the CLR object.
		clrObject.ShowMessage( shellFrame.OuterWindow.Handle, "Hello!" + clrObject.GetString(), shellFrame.ShellUI.Vault );
	};
}