Ludosity's Steamworks error CS0118

Hi, today i've installed Ludosity's Steamworks on Unity 5.2, but Unity give me an error, the CS0118 And it tell me: Assets/Plugins/Example Code/Stats.cs(47,33): error CS0118: Stats.GameID' is a field' but a type' was expected; Assets/Plugins/Example Code/Stats.cs(100,33): error CS0118: Stats.GameID' is a field' but a type' was expected;

This is the code where Unity give me the error:

 using System;
 using UnityEngine;
 using ManagedSteam;
 using ManagedSteam.Exceptions;
 
 /// <summary>
 /// A simple example script showing how to get and set Stats.
 /// Remember to also add the Steamworks script to a object so it can setup the library.
 /// 
 /// You will have to add the stats in the Steamworks AppAdmin page to be able to successfully read 
 /// and write the stat values.
 /// </summary>
 public class Stats : MonoBehaviour
 {
     public GameObject GameID;
     private void Start()
     {
         if (Steamworks.SteamInterface == null)
         {
             // Startup of the library failed.
             UnityEngine.Debug.LogError("SteamInterface startup failed!");
             return;
         }
 
         IStats stats = Steamworks.SteamInterface.Stats;
 
         // Register to the event that is raised when stats are received.
         stats.UserStatsReceived += UserStatsReceived;
         // Register to the event that is raised when stats are saved to the server.
         stats.UserStatsStored += UserStatsStored;
 
         // Ask the steam client to download stats for the current user.
         stats.RequestCurrentStats();
     }
 
     /// <summary>
     /// Called when stats for a user have been downloaded.
     /// </summary>
     /// <param name="value"></param>
     private void UserStatsReceived(ManagedSteam.CallbackStructures.UserStatsReceived value)
     {
         int GameID;
         // Make sure that the callback is for this game
         Debug.Log("value.GameID: " + value.GameID.ToString() + "; Steamworks.SteamInterface.AppID: " + Steamworks.SteamInterface.AppID.ToString());
         Debug.Log("value.Result: " + value.Result);
     
         if (value.GameID == new GameID(Steamworks.SteamInterface.AppID.AsUInt64))   <====ERROR
         {
             if (value.Result != ManagedSteam.SteamTypes.Result.OK)
             {
                 UnityEngine.Debug.LogError("Failed to download stats.");
                 return;
             }
 
             // The stats have been downloaded successfully
 
             IStats stats = Steamworks.SteamInterface.Stats;
 
             // Read the value of an INT stat named TestStatInt and a FLOAT stat named TestStatFloat.
             int intData;
             float floatData;
             if (!stats.GetStat("TestStatInt", out intData))
             {
                 UnityEngine.Debug.LogWarning("Failed to read TestStatInt");
             }
             if (!stats.GetStat("TestStatFloat", out floatData))
             {
                 UnityEngine.Debug.LogWarning("Failed to read TestStatFloat");
             }
 
             UnityEngine.Debug.Log("TestStatInt = " + intData.ToString());
             UnityEngine.Debug.Log("TestStatFloat = " + floatData.ToString());
 
 
             // Change the stat values and save them
             intData++;
             floatData += 0.5f;
             if (!stats.SetStat("TestStatInt", intData))
             {
                 UnityEngine.Debug.LogWarning("Failed to write TestStatInt");
             }
             if (!stats.SetStat("TestStatFloat", floatData))
             {
                 UnityEngine.Debug.LogWarning("Failed to write TestStatFloat");
             }
 
             // Tell the steam client that we want to upload the new stat values.
             // This will cause the UserStatsStored method to be called once the upload is complete.
             stats.StoreStats();
         }
     }
 
     /// <summary>
     /// Called when stats have been saved to the steam servers.
     /// </summary>
     /// <param name="value"></param>
     private void UserStatsStored(ManagedSteam.CallbackStructures.UserStatsStored value)
     {
         // Make sure that the callback is for this game
         if (value.GameID == new GameID(Steamworks.SteamInterface.AppID.AsUInt64))  <=====ERROR
         {
             if (value.Result == ManagedSteam.SteamTypes.Result.OK)
             {
                 UnityEngine.Debug.Log("Stats saved to the server successfully.");
             }
             else
             {
                 UnityEngine.Debug.LogWarning("Failed to save stats to the server.");
             }
         }
     }
 
 }

Thanks to all!