problem with converting js to c#

Hi, i try join this js:

 #pragma strict
 
 var animator: Animator;
 
 function Start () {
     animator = GetComponent("Animator");
 }
 
 function Update () {
     if(Input.GetKey(KeyCode.W)){
         animator.SetBool("stop", false);
         animator.SetBool("stop2", false);
     }
     else{
         animator.SetBool("stop", true);
         animator.SetBool("stop2", true);
     }
 }

to this c# script:

 using System.Collections;
 
 public class BotAiScript : MonoBehaviour {
 
     public Transform target;
     public Transform enemyTransform;
     public Animator animator;
     public float rotationSpeed=10f;
     public float MinDist;
     public float MaxDist;
     public float speed;
     public float maxspeed;
     public float accelerate;
     Vector3 upAxis = new Vector3 (0f, 0f, -1f);
     
     void Start () {
         animator = GetComponent("Animator");
     }
     
     void Update(){
         //rotate to look at the player
         
         transform.LookAt(target.position);
         transform.Rotate(new Vector3(0,-90,-90),Space.Self);//correcting the original rotation
         
         //move towards the player
 
         if (Vector3.Distance (enemyTransform.position, target.position) >= MinDist) {
             rigidbody2D.velocity = transform.up * speed * Time.deltaTime;
             animator.SetBool("stop", false);
             animator.SetBool("stop2", false);
             if(speed < maxspeed) {
                 speed += accelerate;
             }
         }
         if(Vector3.Distance (enemyTransform.position, target.position) <= MinDist && Vector3.Distance(enemyTransform.position,target.position) >= MaxDist) {
             animator.SetBool("stop", true);
             animator.SetBool("stop2", true);
             if(speed > 0) {
                 speed -= accelerate;
             }
             else{
                 speed += accelerate;
             }
         }
         if(Vector3.Distance(enemyTransform.position,target.position) <= MaxDist) {
             rigidbody2D.velocity = transform.up * speed * Time.deltaTime;
             if(speed > -400) {
                 speed -= accelerate * 5;
             }
         }
     }    
 }

but it write: (18,17): error CS0266: Cannot implicitly convert type UnityEngine.Component' to UnityEngine.Animator'. An explicit conversion exists (are you missing a cast?)

i dont know how to translate it to c# thx.