Help converting a few lines of JS to C#.

I need help with this code. everything here seems to be NOT throwing errors, the one that shows the positioning of the "levelBar" is (the really long line) throws the error: "Assets/SpaceOverload/Scripts/experiencemanager.cs(18,49): error CS0119: Expression denotes a type', where a variable', value' or method group' was expected"

here is the code before and after: (im 13, and just started learning C# about a month ago, so if you explain it, please explain it in a way i can understand)

JAVASCRPIT

 #pragma strict
 
 //here are public variables that are accessed in the inspector. this script manages the experience bar and the level text at the top of the screen.
 var levelText:GUIText;
 var levelBar:GUITexture;
 var bar1:GUITexture;
 var lvlUpSound:AudioClip;
 
 //these keep track of amount of experience and level number
 var expAmount:float = 0.0;
 private var level:int = 1;
 
 function Update () {
 //make sure the blue part of the level bar stays the same height as the white and black bar while changing resolution
 levelBar.transform.localScale = Vector3(0.24*(expAmount/(45*level)),bar1.transform.localScale.y,1);
 
 //this checks to see if theres enough experience to level up. for this simple example we made it take 45 orbs more for every level to level up.
 if(expAmount >= (45*level)){
 //play the level up sound if we level up.
 GetComponent.<AudioSource>().PlayOneShot(lvlUpSound);
 //exp goes back to 0 so the bar is blank again.
 expAmount = 0;
 // add a level
 level += 1;
 // update the level text at the top to show the new level
 levelText.text = "Lvl " + level.ToString();
 //this message is received by weapons so they can keep track of the level and get better as well. 
 SendMessage("levelup", level, SendMessageOptions.DontRequireReceiver);
 }
 }
 
 //if an orb hits the player, we gain experience. (expAmount)
 function OnTriggerEnter (other : Collider){
 if(other.name == "exp(Clone)"){
 expAmount += 1;
 Destroy(other.gameObject);
 }
 if(other.tag == "XPMultiplier"){
 expAmount *= 2;
 }
 }

WHAT I TURNED INTO C#. LINE 18 throws errors

 using UnityEngine;
 using System.Collections;
 
 public class experiencemanager : MonoBehaviour {
 
     public GUIText levelText;
     public GUITexture levelBar;
     public GUITexture bar1;
     public AudioClip lvlUpSound;
     public float expAmount = 0.0f;
     public int level = 0;
     private AudioSource source;
 
 
     
     // Update is called once per frame
     void Update () {
         levelBar.transform.localScale = Vector3 (0.24 * (expAmount / (45 * level)), bar1.transform.localScale.y, 1);
 
         if (expAmount >= (45 * level)) {
             source = GetComponent<AudioSource>();
             expAmount = 0;
             level += 1;
             levelText.text = "Level " + level.ToString();
             SendMessage("levelup", level, SendMessageOptions.DontRequireReceiver);
             source.PlayOneShot(lvlUpSound);
         }
     }
     void OnTriggerEnter (Collider other) {
         if (other.name == "exp(clone)") {
             expAmount += 1;
             GameObject.Destroy(this);
         }
     if (other.tag == "XPMultiplier") {
             expAmount *= 2;
         }
     }
 }