Help with AngryAsteroind game.

I was following tutorial
http://unity3d.com/learn/tutorials/modules/beginner/live-training-archive/making-angry-birds-style-game?playlist=17093 and in script i have like 10 erros and he doesnt.
Can you pls help me with my script ?

 using UnityEngine;
using System.Collections;

public class ProjectileDraging : MonoBehaviour {
    public float MaxStreach = 3f;
    public LineRenderer CatapultLineFront;
    public LineRenderer CatapultLineBack;
    private Transform catapult;
    private SpringJoint2D spring;
    private Ray rayToMouse;
    private Ray leftcatapultToProjectile;
    private float maxStreachsqr;
    private float circleRadius;
    private bool clickedOn;
    private Vector2 prevVelocity;
    void Awake()
    {
        spring = GetComponent<SpringJoint2D>();
        catapult = spring.connectedBody.transform;
    }

	void Start ()
    {
        LineRendererSetUp();
        rayToMouse = new Ray(catapult.position, Vector3.zero);
        leftcatapultToProjectile = new Ray(CatapultLineFront.transform.position, Vector3.zero);
        maxStreachsqr = MaxStreach * MaxStreach;
        CircleCollider2D circle = collider2D as CircleCollider2D;
        circleRadius = circle.radius;
    }
	
	void Update ()
    {
        if (clickedOn)
            Dragging = true;
        if(spring != null)
        {
            if (!rigidbody2D.isKinematic && prevVelocity.sqrMagnitude > rigidbody2D.velocity.sqrMagnitude)
            {
                Destroy(spring);
                rigidbody2D.velocity = prevVelocity;
            }

            if (!clickedOn)
            {
                prevVelocity = rigidbody2D.velocity;
            }

            LineRendererUpdate();
        }
        else
        {
            CatapultLineBack.enabled = false;
            CatapultLineFront.enabled = false;
        }
	}

    void LineRendererSetUp()
    {
        CatapultLineFront.SetPosition(0, CatapultLineFront.transform.position);
        CatapultLineBack.SetPosition(0, CatapultLineBack.transform.position);

        CatapultLineFront.sortingLayerName = "Foerground";
        CatapultLineBack.sortingLayerName = "Foerground";

        CatapultLineFront.sortingOrder = 3;
        CatapultLineBack.sortingOrder = 1;
    }

    void OnMouseDown()
    {
        spring.enable = false;
        clickedOn = true;
    }

    void OnMouseUp()
    {
        spring.enable = true;
        rigidbody2D.isKinematic = false;
        clickedOn = false;
    }

    void Dragging()
    {
        Vector3 mouseWorldPoint = Camera.main.ScreenToViewportPoint(Input.mousePosition);
        Vector2 catapultToMouse = mouseWorldPoint - catapult.position;
        if (catapultToMouse.sqrMagnitude > maxStreachsqr)
        {
            rayToMouse.direction = catapultToMouse;
            mouseWorldPoint = rayToMouse.GetPoint(MaxStreach);
        }
            mouseWorldPoint.z = 0f;
            transform.position = mouseWorldPoint;
    }
    void LineRendererUpdate()
    {
        Vector2 catapultToProjectile = transform.position - CatapultLineFront.transform.position;
        leftcatapultToProjectile.direction = catapultToProjectile;
        Vector3 HoldPonint = leftcatapultToProjectile.GetPoint(catapultToProjectile.magnitude + circleRadius);
        CatapultLineFront.SetPosition(1, HoldPonint);
        CatapultLineBack.SetPosition(1, HoldPonint);
    }
}
 Severity	Code	Description	Project	File	Line
Error	CS1656	Cannot assign to 'Dragging' because it is a 'method group'	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	35

Severity	Code	Description	Project	File	Line
Error	CS1061	'SpringJoint2D' does not contain a definition for 'enable' and no extension method 'enable' accepting a first argument of type 'SpringJoint2D' could be found (are you missing a using directive or an assembly reference?)	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	72

Severity	Code	Description	Project	File	Line
Error	CS1061	'SpringJoint2D' does not contain a definition for 'enable' and no extension method 'enable' accepting a first argument of type 'SpringJoint2D' could be found (are you missing a using directive or an assembly reference?)	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	78

Severity	Code	Description	Project	File	Line
Error	CS0619	'Component.rigidbody2D' is obsolete: 'Property rigidbody2D has been deprecated. Use GetComponent<Rigidbody2D>() instead. (UnityUpgradable)'	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	38

Severity	Code	Description	Project	File	Line
Error	CS0619	'Component.rigidbody2D' is obsolete: 'Property rigidbody2D has been deprecated. Use GetComponent<Rigidbody2D>() instead. (UnityUpgradable)'	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	38

Severity	Code	Description	Project	File	Line
Error	CS0619	'Component.rigidbody2D' is obsolete: 'Property rigidbody2D has been deprecated. Use GetComponent<Rigidbody2D>() instead. (UnityUpgradable)'	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	41

Severity	Code	Description	Project	File	Line
Error	CS0619	'Component.rigidbody2D' is obsolete: 'Property rigidbody2D has been deprecated. Use GetComponent<Rigidbody2D>() instead. (UnityUpgradable)'	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	46

Severity	Code	Description	Project	File	Line
Error	CS0619	'Component.rigidbody2D' is obsolete: 'Property rigidbody2D has been deprecated. Use GetComponent<Rigidbody2D>() instead. (UnityUpgradable)'	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	79

Severity	Code	Description	Project	File	Line
Error	CS0619	'Component.collider2D' is obsolete: 'Property collider2D has been deprecated. Use GetComponent<Collider2D>() instead. (UnityUpgradable)'	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	28

Severity	Code	Description	Project	File	Line
Error	CS1061	'Component' does not contain a definition for 'velocity' and no extension method 'velocity' accepting a first argument of type 'Component' could be found (are you missing a using directive or an assembly reference?)	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	38

Severity	Code	Description	Project	File	Line
Error	CS1061	'Component' does not contain a definition for 'velocity' and no extension method 'velocity' accepting a first argument of type 'Component' could be found (are you missing a using directive or an assembly reference?)	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	41

Severity	Code	Description	Project	File	Line
Error	CS1061	'Component' does not contain a definition for 'velocity' and no extension method 'velocity' accepting a first argument of type 'Component' could be found (are you missing a using directive or an assembly reference?)	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	46

Severity	Code	Description	Project	File	Line
Error	CS1061	'Component' does not contain a definition for 'isKinematic' and no extension method 'isKinematic' accepting a first argument of type 'Component' could be found (are you missing a using directive or an assembly reference?)	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	38

Severity	Code	Description	Project	File	Line
Error	CS1061	'Component' does not contain a definition for 'isKinematic' and no extension method 'isKinematic' accepting a first argument of type 'Component' could be found (are you missing a using directive or an assembly reference?)	AngryBirdLikeGame.CSharp	C:\Users\Jordan\Documents\AngryBirdLikeGame\Assets\Scripts\ProjectileDraging.cs	79

This pretty much explains it all I think… put that into Google and it will tell you pretty much how to fix it.

Kurt