Error CS1519

I wrote the game and came across this error:

Assets/Scripts/MenuManager.cs(10,12): error CS1519: Unexpected symbol `void' in class, struct, or interface member declaration

Here is the code of this file:

 using UnityEngine;
 using System.Collections;
 
 public class MenuManager : MonoBehaviour 
 {
     public string CurrentMenu;
     
     public string MatchName
     
     void Start()
     {
         CurrentMenu = "Main";    
     }
     
     void OnGUI()
     {
         if(CurrentMenu == "Main")
             Menu_Main();
         if(CurrentMenu == "Lobby")
             Menu_Lobby();
         if(CurrentMenu == "Host")
             Menu_HostGame();
     }
     
     public void NavigateTo(string nextmenu)
     {
         CurrentMenu = nextmenu;
     }
     
     private void Menu_Main()
     {
         if(GUI.Button(new Rect(10,10,200,50), "HostGame"))
         {
             NavigateTo("host");
         }
     }
     
     private void Menu_HostGame()
     {
         //Buttons Host Game
         if(GUI.Button(new Rect(10,10,200,50), "Back"))
         {
             NavigateTo("Main");
         }
         
         if(GUI.Button(new Rect(10,60,200,50), "Start Server"))
         {
             
         }
         
         GUI.Label(new Rect(220,10,130,30), "Match Name");
         MatchName = GUI.TextField(new Rect(400,10,200,30), MatchName);
     }
     
     private void Menu_Lobby()
     {
     
     }
 }