Serializer.cs

using System;
using System.IO;
using UnityEngine;
using System.Runtime.Serialization.Formatters.Binary;

namespace Serialization
{
    public class Serializer
    {
        public static void Save<T>(string filename, T data) where T : class
        {
            using (Stream stream = File.OpenWrite(Application.persistentDataPath + "/" + filename))
            {
                BinaryFormatter formatter = new BinaryFormatter();
                formatter.Serialize(stream, data);
                stream.Close();
            }
        }

        public static T Load<T>(string filename) where T : class
        {
            if (DoesFileExist(filename))
            {
                try
                {
                    using (Stream stream = File.OpenRead(Application.persistentDataPath + "/" + filename))
                    {
                        BinaryFormatter formatter = new BinaryFormatter();
                        return formatter.Deserialize(stream) as T;
                    }
                }
                catch (Exception e)
                {
                    Debug.Log(e.Message);
                }
            }
            return default(T);
        }

        public static void DeleteSave(string filename)
        {
            if(File.Exists(Application.persistentDataPath + "/" + filename))
            {
                File.Delete(Application.persistentDataPath + "/" + filename);
            }
        }

        public static bool DoesFileExist(string filename)
        {
            if (File.Exists(Application.persistentDataPath + "/" + filename))
                return true;
            else
                return false;
        }
    }
}