How I can save mouse position ?

Script saves all player's position except the mouse position . What i need to do to fix it ?

 #pragma strict
 #pragma downcast
 
 import System.IO; 
 import System.Runtime.Serialization;   
 import System.Runtime.Serialization.Formatters.Binary;      
 import System.Collections.Generic;
 import System.Text ;
 
 class RP 
      
    {   
    var Rx:float;
    var Ry:float;
    var Rz:float;
    var CPx:float;
    var CPy:float;
    var CPz:float;
    var Px:float;   
    var Py:float;   
    var Pz:float;
    var prx:float;
    var pry:float;
    var prz:float;
    }   
 
    function Write() 
      
    { 
         
    var w: RP  = new RP();  
    w.Rx=Camera.main.transform.eulerAngles.x;
    w.Ry=Camera.main.transform.eulerAngles.y;
    w.Rz=Camera.main.transform.eulerAngles.z;
    w.CPx=Camera.main.transform.position.x;
    w.CPy=Camera.main.transform.position.y;
    w.CPz=Camera.main.transform.position.z;
    w.Px=transform.position.x;   
    w.Py=transform.position.y;   
    w.Pz=transform.position.z;
    w.prx=transform.eulerAngles.x;
    w.pry=transform.eulerAngles.y;
    w.prz=transform.eulerAngles.z;
                       
    var fs: FileStream  = new FileStream ("RP.xyz",FileMode.Create);   
    var bf: BinaryFormatter  = new BinaryFormatter();       
    bf.Serialize(fs, w);   
    fs.Close();   
    }   
 
    function Read() 
      
    {      
    var vf: IFormatter  = new BinaryFormatter();   
    var fs = new FileStream("RP.xyz", FileMode.Open, FileAccess.Read);   
    var w1: RP= vf.Deserialize(fs);
    transform.eulerAngles = new Vector3(w1.prx,w1.pry,w1.prz);
    Camera.main.transform.position=new Vector3(w1.CPx,w1.CPy,w1.CPz);
    Camera.main.transform.eulerAngles = new Vector3(w1.Rx,w1.Ry,w1.Rz);
    transform.position=new Vector3(w1.Px,w1.Py,w1.Pz);   
    fs.Close();   
    } 
 
    function LateUpdate()   
    {   
    if (Input.GetKey(KeyCode.F9))      
    {   
    Read();   
    }   
    if (Input.GetKey(KeyCode.F5))      
    {   
    Write();   
    }   
    }