Rewriting script from JavaScript to C#

Need help. I try to rewrite script from JavaScript to C#. I run my project but crosshair does not shows. There is the JavaScript:

 @script ExecuteInEditMode()
 var crosshairPreset : preset = preset.none;
  
 var showCrosshair : boolean = true;
 var verticalTexture : Texture;
 var horizontalTexture : Texture;
  
 //Size of boxes
 var cLength : float = 10;
 var cWidth : float = 3;
  
 //Spreed setup
 var minSpread : float = 45.0;
 var maxSpread : float = 250.0;
 var spreadPerSecond : float = 150.0;
 
  
 private var temp : Texture;
 private var spread : float;
  
 function Update(){
         //Used just for test (weapon script should change spread).
         if(Input.GetButton("Fire1")) spread += spreadPerSecond * Time.deltaTime; 
         else spread -= spreadPerSecond * 2 * Time.deltaTime;    
         
 }
 function OnGUI(){
         if(showCrosshair && verticalTexture && horizontalTexture){
                 var verticalT = GUIStyle();
                 var horizontalT = GUIStyle();
                 verticalT.normal.background = verticalTexture;
                 horizontalT.normal.background = horizontalTexture;
                 spread = Mathf.Clamp(spread, minSpread, maxSpread);
                              
                 
                 
                         //Horizontal
                         GUI.Box(Rect((Screen.width - cWidth)/2, (Screen.height - spread)/2 - cLength, cWidth, cLength), temp, horizontalT);
                         GUI.Box(Rect((Screen.width - cWidth)/2, (Screen.height + spread)/2, cWidth, cLength), temp, horizontalT);
                         //Vertical
                         GUI.Box(Rect((Screen.width - spread)/2 - cLength, (Screen.height - cWidth)/2, cLength, cWidth), temp, verticalT);
                         GUI.Box(Rect((Screen.width + spread)/2, (Screen.height - cWidth)/2, cLength, cWidth), temp, verticalT);
                 
         }
 }

There is the C#: using UnityEngine; using System.Collections;

 public class Proba : MonoBehaviour {
     bool  showCrosshair = true;
     public Texture2D verticalTexture;
         public Texture2D horizontalTexture;
     public float cLength = 10;
     public float cWidth = 3;
     //Spreed setup
     public float minSpread = 45.0f;
     public float maxSpread = 250.0f;
     public float spreadPerSecond = 150.0f;
     
     
     private Texture temp;
     private float spread;
     public GUIStyle verticalT;
     public GUIStyle horizontalT;
     
     // Update is called once per frame
     void Update () {
                 //Used just for test (weapon script should change spread).
         if(Input.GetButton("Fire1")) spread += spreadPerSecond * Time.deltaTime; 
         else spread -= spreadPerSecond * 2 * Time.deltaTime;   
     
     }
     void OnGUI(){
         if(showCrosshair && verticalTexture && horizontalTexture){
                 //var verticalT = GUIStyle();
                 //var horizontalT = GUIStyle();
                 verticalT.normal.background = verticalTexture;
                 horizontalT.normal.background = horizontalTexture;
                 spread = Mathf.Clamp(spread, minSpread, maxSpread);
 
                
                         
                         //Horizontal
                         GUI.Box( new Rect((Screen.width - cWidth)/2, (Screen.height - spread)/2 - cLength, cWidth, cLength), temp, horizontalT);
                         GUI.Box( new Rect((Screen.width - cWidth)/2, (Screen.height + spread)/2, cWidth, cLength), temp, horizontalT);
                         //Vertical
                         GUI.Box( new Rect((Screen.width - spread)/2 - cLength, (Screen.height - cWidth)/2, cLength, cWidth), temp, verticalT);
                         GUI.Box( new Rect((Screen.width + spread)/2, (Screen.height - cWidth)/2, cLength, cWidth), temp, verticalT);
                 
         }
 }
 }