Error in line 11, if you set the sign “;”, then there will be an error 1030 and 1519

I tried fixes from other forums to no avail. turned to friends. the answer was nothing clear. Please help.

using UnityEngine;

public class CameraPlayer
{
        public float sesnityX;
        public float sesnityY;
        
        public string Transform; orientation
        
        
        private float xRotation;
        private float yRotation;
        
        
        void Start()
        {
            Cursor.lockState =CursorLockMode.Locked;
            Cursor.visible = false;
        }

        void Update()
        {
            float mouseX = Input.GetAxisRaw("Mouse X") * sesnityX * Time.deltaTime;
            float mouseY = Input.GetAxisRaw("Mouse Y") * sesnityY * Time.deltaTime;
            
            yRotation += mouseX;
            xRotation -= mouseY;
            
            xRotation = Mathf.Clamp(value:xRotation, min:-90f, max:90f);
            
            // Camera rotation
            transform.rotation = Quaternion.Euler(xRotation, yRotation, z:0);
            orientation.rotation = Quaternion.Euler(x:0, yRotation, z:0);
        }
}