Sharing Violation On Path

So I've redone my save/load script, but I am encountering a Sharing Violation On Path error.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 using System.IO;
 using System.Runtime.Serialization;
 using System.Runtime.Serialization.Formatters.Binary;
 
 
 public class SaveAndLoad
 {
     public static BinaryFormatter binaryFormatter = new BinaryFormatter();
 
     public static void Save(string saveString, object obj, string saveName)
     {
         string fileType = ".dat";
         string saveGameName = saveName + fileType;
 
         //Create directory if missing
         if(!Directory.Exists("saves/"))
         {
             Directory.CreateDirectory("saves/");
             Debug.Log("Save directory missing, creating new save directory. 'saves/'");
         }
         else
         {
             Debug.Log("Save directory exists.");
         }
 
         //Check if file exists, if not, create file. If the directory does not exist, create one and try again.
         if(File.Exists("saves/" + saveGameName))
         {
             Debug.Log("Save data exists.");
         }
         else
         {
             File.Create("saves/" + saveGameName);
             Debug.Log("Save data missing, creating new empty save data.");
         }
 
 
 
 
 
         //Save game data to file.
         FileStream fileStream = File.Open("saves/" + saveGameName, FileMode.Open);
 
         StreamWriter writer = new StreamWriter("saves/" + saveGameName);
 
         SaveData data = new SaveData();
 
         data.playerStatData.playerAttributes = data.playerStatData.playerAttributes;
         data.playerStatData.playerSkills = data.playerStatData.playerSkills;
 
         writer.Write(data);
 
         //binaryFormatter.Serialize(saveGameName, data.GetData());
         fileStream.Close();
 
 
     }
 
     public static object Load(string saveString, object obj, string saveName)
     {
         string saveGameName = saveName + ".txt";
         string temp = File.ReadAllText(saveGameName);
 
         if(temp == string.Empty)
         {
             return null;
         }
         MemoryStream memStream = new MemoryStream(System.Convert.FromBase64String(temp));
         return binaryFormatter.Deserialize(memStream);
     }
 
     [System.Serializable]
     class SaveData 
     {
         public RPGSystemPlayerStats playerStatData;
 
         public void GetData ()
         {
             playerStatData.ToString();
         }
     }
 }