Unity error CS1014

So I'm watching a tutorial on how to make own FPS game, because I want to learn Unity but I get this error message but the person in the video not. I'm still new to C# and I can't figure out what's wrong... Here is the code:

 using UnityEngine;
 using System.Collections;
 
 public class bullet_ThermalDetonator : MonoBehaviour {
 
     float lifespan = 3.0f;
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
         lifespan -= Time.deltaTime;
 
         if(lifespan <= 0) {
             Explode();
         }
     }
 
     void OnCollisionEnter(Collision collision) {
 
                 if (Collision.gameObject.tag == "Enemy") {
                         Destroy (collision.gameObject);
                         Destroy (gameObject);
                 }
         }
 
     void Explode {
 
         Dsestroy(gameObject);
 
     }
 }