error CS0122: `UnityEngine.Transform.Transform()' is inaccessible due to its protection level

I've been looking at people with the same issue and how they solved it but it's not working for me. Here's my code; do you think you can help me: using UnityEngine; using UnityEngine.UI; using System.Collections;

 public class CameraMouse : MonoBehaviour    {
 
     public float distance = 5.0f;
     public float xSensitivity = 5.0f;
     public float ySensitivity = 5.0f;
     public float xAngle = 0.0f;
     public float yAngle = 0.0f;
     public int target = new Transform();
 
     void LateUpdate ()
     {
         // Only if there is a target
         if (target) {
             if (Input.GetMouseButton (1))
 
                 // Update x, y angle with the mouse delta
                 yAngle -= Input.GetAxis ("Mouse Y") * ySensitivity;
 
 
             if (Input.GetMouseButton (1))
                 xAngle += Input.GetAxis ("Mouse X") * xSensitivity;
 
             yAngle = Mathf.Clamp (yAngle, 0, 90);
 
             // Initialize the position to be distance units along the z axis
             // away from the target
             transform.position = Vector3.forward * distance + target.position;
 
             // Initialize the rotation to look at the target
             transform.LookAt (target.position);
 
             // Rotate around the world up axis by the accumulated delta mouse x
             transform.RotateAround (target.position, Vector3.up, xAngle);
 
             // Rotate around our own right vector by the accumulated delta mouse y
             worldRight = transform.TransformDirection (Vector3.right);
             transform.RotateAround (target.position, worldRight, yAngle);
         }
     }
 }

thanks!