`UnityEngine.Transform.position'. Consider storing the value in a temporary variable

JS

     #pragma strict

 var walkSpeed : float = 7; //Regular speed
 var crouchSpeed : float = 3; //Speed while crouching
 var sprintSpeed : float = 13; // Speed while sprinting

 private var charMotor : CharacterMotor;
 private var charController : CharacterController;
 private var theTransform : Transform;
 private var charHeight : float; //Initial height

 function Start () 
 {
     charMotor = GetComponent(CharacterMotor);
     theTransform = transform;
     charController = GetComponent(CharacterController);
     charHeight = charController.height;
 }

 function Update () 
 {
     var h = charHeight;
     var speed = walkSpeed;
     
     if (charController.isGrounded && Input.GetKey("left shift") || Input.GetKey("right shift"))
     {
         speed = sprintSpeed;
     }
     
     if (Input.GetKey("c"))
     {
         h = charHeight*0.5;
         speed = crouchSpeed;
     }
     
     charMotor.movement.maxForwardSpeed = speed; // Setting the max speed
     var lastHeight = charController.height; //Stand up/crouch smoothly
     charController.height = Mathf.Lerp(charController.height, h, 5*Time.deltaTime);
     theTransform.position.y += (charController.height-lastHeight)/2; //Fix vertical position
 }

C#

 using UnityEngine;
 using System.Collections;
 
 public class SprintAndCrouch : MonoBehaviour {
     
     public float walkSpeed = 7;
     public float runSpeed = 13;
     public float crouchSpeed = 3;
 
     private float speed;
 
     //Stamina Variables
     public int stamina;
     public int maxStamina = 100;
     private bool canRun = true;
 
     private CharacterController charControl;
     private CharacterMotor charMotor;
     private Transform theTransform;
     private float charHeight;
 
     // Use this for initialization
     void Start () 
     {
         charMotor = GetComponent <CharacterMotor>();
         charControl = GetComponent <CharacterController>();
         theTransform = new GameObject().transform;
         charHeight = charControl.height;
     }
     
     // Update is called once per frame
     void Update ()
     {
         speed = walkSpeed;
 
         Sprint ();
         Crouch ();
     }
     
     void Sprint()
     {
         int fatigueAdd = 1;
         
         if (Input.GetKey (KeyCode.LeftShift) && charControl.isGrounded && stamina <= maxStamina && canRun == true) 
         {
             canRun = true;
             
             speed = runSpeed;
             
             stamina = stamina + fatigueAdd;
             
             //Walks if stamina is greater than max stamina
             if(stamina >= maxStamina)
             {
                 speed = walkSpeed;
                 canRun = false;
             }
         }
         
         //If not running decrement stamina
         else if(stamina > 0)
         {
             stamina -= 1;
             
             //Set canRun to true if stamina hits 0
             if(stamina == 0)
                 canRun = true;
         }
         
         charMotor.movement.maxForwardSpeed = speed;
         charMotor.movement.maxSidewaysSpeed = speed;
     }
 
     void Crouch()
     {
         float h = charHeight;
 
         if(Input.GetKey(KeyCode.C))
         {
             h = charHeight / 2;
             speed = crouchSpeed;
         }
 
         charMotor.movement.maxForwardSpeed = speed;
         charMotor.movement.maxSidewaysSpeed = speed;
 
         float lastHeight = charControl.height;
         charControl.height = Mathf.Lerp (charControl.height, h, Time.deltaTime * 5);
         //theTransform.position.y += (charControl.height - lastHeight) / 2;
 
         //Vector3 temp = new Vector3(transform.position.x, charControl.height - lastHeight/2, transform.position.z);
 
 //Bug where the player falls out of the plane/ground
         Vector3 temp = Vector3.zero;
         temp.y = (charControl.height - lastHeight) / 2;
         theTransform.position += temp;
     }
 }
 

Are this lines of code the same.

Since in the C# script there's a bug where the Player is gonna fall of the plane/ground while the JS is perfectly fine and doesn't produce a bug like in the C# script.