Demonstrates different ways to launch VS Code from C# code on Windows

RunVsCodeFromDotnet.cs

void Main()
{
	string file = @"C:\temp\test.md";
			
	OpenFileInTextEditorRegistry(file);
	
	//OpenEditorWithShellExecute(file);
		
	//OpenWithProcessStartFailed(file);
}

public static void OpenFileInTextEditorRegistry(string filename)
{
	string executable = "notepad.exe";
	var keyValue = Registry.ClassesRoot.OpenSubKey(@"Applications\Code.exe\shell\open\command")?.GetValue(null) as string;
	if (keyValue != null && keyValue.Contains("code.exe",StringComparison.InvariantCultureIgnoreCase))
	{
		executable = StringUtils.ExtractString(keyValue,@"""",@"""");			
	}
	var pi = new ProcessStartInfo
	{
		UseShellExecute = true,
		FileName = executable,
		Arguments = filename,		
	};
	var res = Process.Start(pi);	
}

public static void OpenEditorWithShellExecute(string filename)
{
	var pi = new ProcessStartInfo
	{
		UseShellExecute = true,
		FileName = "code",  // "invalid_codePath"  - should start Notepad
		Arguments = filename,
		WindowStyle = ProcessWindowStyle.Hidden

	};
	
	try
	{
		var res = Process.Start(pi);		
	}
	catch(Exception ex)
	{
		pi.WindowStyle = ProcessWindowStyle.Normal;
		pi.FileName = "notepad.exe";
		var res = Process.Start(pi);
	}
}


public static void OpenWithProcessStartFailed(string filename)
{	
	var pi = new ProcessStartInfo
	{	
		FileName = "code",
		Arguments = filename,
	};
	var res = Process.Start(pi);
}