Custom C# Crouch Script

Hey,

I know there are some similar questions out there. I have already looked int to them but most of them are written in Java- respective Unityscript, with which I' m quiet unfamiliar. So I come up with this one.

To get used to the scripting with Unity, I try to work out erverthing by myself. I'm currently working trough a C# book at the same time, so potentally the problem is the poor understanding by myself for this language.

I came up with, like the title says, a charctercontroller script and tried to add a crouching ability. So this is the code I came up with (I erased the unnecessary code):

 using UnityEngine;
 using System.Collections;
 
 public class PlayerController : MonoBehaviour {
 
     public float movementSpeed = 5.0f;
 
     public float rotationSpeed = 5.0f;
     float verticalRotation = 0;
     float rotationBoundary = 60.0f;
 
     public float jumpSpeed = 0.0f;
     float verticalVelocity = 0;
 
     float ccSizeCrouch = 2;
     int crouchOffset = 1;
     float cameraCrouchOffset = - 0.75f;
 
     //Methoden Deklaration
 
 
 
 
 
     // Use this for initialization
     void Start () 
     {
         Screen.lockCursor = true;
 
 
 
     }
     
     // Update is called once per frame
     void Update () 
     {
         //Kamera Drehung zum Umschauen
         
         float lookHorizontal = Input.GetAxis ("Mouse X") ;
         transform.Rotate (0, lookHorizontal, 0);
         
         verticalRotation -= Input.GetAxis ("Mouse Y") ;
         verticalRotation = Mathf.Clamp (verticalRotation, -rotationBoundary, rotationBoundary);
         
         
         //Speichert die Kamera Rotation als Quaterion Euler um sie mit Vector 3 verwenden zu können
         Camera.main.transform.localRotation = Quaternion.Euler (verticalRotation, 0, 0);
 
 
 
         //Hier wird die Bewegung eingerichtet
         CharacterController cc = GetComponent<CharacterController>();
 
         //Ermöglicht dem Char zu springen
 
         if (Input.GetButtonDown ("Jump") && cc.isGrounded) 
         {
             verticalVelocity = jumpSpeed;
         
         }
 
         //Schwerkraft
 
         verticalVelocity += Physics.gravity.y * Time.deltaTime;
 
         //Grundlegende Bewegung auf den Achsen
         float moveHorizontal = Input.GetAxis ("Horizontal");
         float moveVertical = Input.GetAxis ("Vertical");
         Vector3 movement = new Vector3 (moveHorizontal, verticalVelocity, moveVertical);
 
         //Sprinten
 
         if (Input.GetButton ("Run")) 
         {
             movementSpeed = 10.0f;
         } 
         else 
             movementSpeed = 5.0f;
 
         //Setzt den neuen Transform in Abhänigkeit von Rotation
         movement = transform.localRotation * movement;
         cc.Move ((movement * movementSpeed)*Time.deltaTime) ;
 
         Implementrierung von Crouch
 
         if (Input.GetButton ("Fire3"))
         {
 
             CharacterController CrouchHeight = (cc.height/ccSizeCrouch) * Time.deltaTime ;
             cc.transform.localPosition.y -= crouchOffset * Time.deltaTime;
             Camera cameraCrouchposition = (camera.main.transform.localPosition.y - cameraCrouchOffset) * Time.deltaTime;
 
             if (Input.GetButtonUp ("Fire3"))
             {
                 CrouchHeight = (cc.height*ccSizeCrouch)*Time.deltaTime;
                 cc.transform.localPosition.y += cameraCrouchOffset * Time.deltaTime;
                 cameraCrouchposition = (camera.main.transform.localPosition.y + cameraCrouchOffset) * Time.deltaTime;
             }
         }
 
 
 
 
 
         }
 
 }
 

After I saved this one and switched back to Unity, I got some errors, which I wasn't able to get fixed.

I would appreciate your help and your opinion with that. And please excuse my spelling and language skills, I'm not a native speaker and it has passed some time since the last time I wrote english.