Getting constant error. Simple script for wind

help I keep getting this error
Assets/darts/WindComponent.cs(16,17): error CS0246: The type or namespace name List1’ could not be found. Are you missing a using directive or an assembly reference?

using UnityEngine;
using System.Collections;

public class WindComponent : MonoBehaviour 
	// To use:
	// 1. Create an empty game object
	// Add a Collider2D to the empty object. I used a standard Box Collider 2D, as a trigger, to create an isolated square that applies "wind"
	// 3. Add this WindComponent to the empty object, then adjust the Force (Vector2). You can adjust this in the editor or in the script, as it is a public property
	// Note: Only works on game objects that have the Rigid Body 2D and Collider 2D components

	// Directional force applied to objects that enter this object's Collider 2D boundaries
	public Vector2 Force =;

	// Internal list that tracks objects that enter this object's "zone"
	private List<Collider2D> objects = new List<Collider2D>();

	// This function is called every fixed framerate frame
	void FixedUpdate()
		// For every object being tracked
		for(int i = 0; i < objects.Count; i++)
			// Get the rigid body for the object.
			Rigidbody2D body = objects*.attachedRigidbody;*
  •  	// Apply the force*
  •  	body.AddForce(Force);*
  •  }*
  • }*

  • void OnTriggerEnter2D(Collider2D other)*

  • {*

  •  objects.Add(other);*
  • }*

  • void OnTriggerExit2D(Collider2D other)*

  • {*

  •  objects.Remove(other);*
  • }*

Add “using System.Collections.Generic;”