CSharpMessenger Extended. Do I REALLY need it?

Unity Engine
1

Following BergZerg Arcade Inventory Tutorial 1-2

Within the tutorial he typed this so one script can execute a function in another script. However CSharpMessenger Extended is required to use some of the functions.

I disagree with this and i know there is another way for scripts to execute another scripts function without CSharpMessenger Extended. How do i do this, i have looked but problems occur…

Press “Inventory” button (Q) to send out a message.

if (Input.GetButton ("Inventory"))
		{
			SendMessage("ToggleInventoryWindow");
		}

Listener hears the message and executes the function on the script

private void OnEnable(){
		Messenger.AddListener ("ToggleInventory", ToggleInventoryWindow);
		}
	private void OnDisable(){
		Messenger.RemoveListener ("ToggleInventory", ToggleInventoryWindow);
	}

The final result

public void ToggleInventoryWindow() {
		if (Input.GetButton ("Inventory")) 
		{
			DisplayInventory = !DisplayInventory;
		}
2

Sounds like something very easy to write, this “messenger”. Looks like a simple “string, action” dictionary.