nexpected symbol 'public' in class, struct, or interface member declaration.

Here is the script. I am for some reason getting this error error CS1519: unexpected symbol 'public' in class, struct, or interface member declaration.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class Buttonoff : MonoBehaviour 
 { 
     public static int volume = volumechange.volume
 
     public void OnClick( dfControl control, dfMouseEventArgs mouseEvent )
     {
         // Add event handler code here
         volumechange.volume = 0; 
         Debug.Log( "Click" );
     }
 
     public void OnMouseDown( dfControl control, dfMouseEventArgs mouseEvent )
     {
         // Add event handler code here
         volumechange.volume = 0;   
         Debug.Log( "MouseDown" );
     }
 
     public void OnMultiTouch( dfControl control, dfTouchEventArgs touchData )
     {
         // Add event handler code here
         volumechange.volume = 0; 
         Debug.Log( "MultiTouch" );
     }
 
 }