How do I stop the camera rotating on the Z axis (tilting left and right),How do I stop the camera from tilting when I turn?

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerMovement : MonoBehaviour
 {
     // Start is called before the first frame update
     void Start()
     {
         Cursor.lockState = CursorLockMode.Locked;
     }
 
     // Update is called once per frame
     void Update()
     {
         
         
         
               transform.Translate(Input.GetAxis("Horizontal")*Time.deltaTime,0f,0f);
               transform.Translate(0f, 0f, Input.GetAxis("Vertical") * Time.deltaTime);
               transform.Rotate(Input.GetAxis("Mouse Y"), Input.GetAxis("Mouse X"), 0);
               
     }
 }
 

Also on a slightly unrelated note, anyone know how to get visual studio to autocomplete with c# results? Using youtube tutorials but I would love to see the functions I could try.,When I look left and right the camera turns on what I think is the Z axis, it tilts right and left like im tilting my head left and right, but I cant figure out how to stop it.

Heres my code:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerMovement : MonoBehaviour
 {
     // Start is called before the first frame update
     void Start()
     {
         Cursor.lockState = CursorLockMode.Locked;
     }
 
     // Update is called once per frame
     void Update()
     {
         
         
         
               transform.Translate(Input.GetAxis("Horizontal")*Time.deltaTime,0f,0f);
               transform.Translate(0f, 0f, Input.GetAxis("Vertical") * Time.deltaTime);
               transform.Rotate(Input.GetAxis("Mouse Y"), Input.GetAxis("Mouse X"), 0);
               
     }
 }
 

Oh and also, anyone know how to get visual studio to add c# functions to the autocomplete thing? kinda going off tutorials on youtube, would love to see what I can try

Thank you to those who help