如何更有效地将字典数据或数组列表数据保存到播放器中

有人知道如何更有效地将字典数据或数组列表数据保存到playerprefs吗？

例如，我有一个类项目：

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
// Make Class Item
public class item {
    public string itemName;
    public int itemID;
    public string itemDesc;
    public string itemIcon;
    public GameObject itemModel;
    public int itemTime;
    public int hightprice;
    public int stdprice;
    public int itemStock;
    public int harvest;
    public RawTree rawTree;
    public ItemType itemType;
    public ItemProd itemProd;
    public ItemLocation itemLocation;
    public ItemMerchant itemMerchant;
    public int Lvlunlock;
    private string baseName;
    public int spawnRate;
    public int minqtySpawnBuy;
    public int maxqtySpawnBuy;
    public int minqtySpawnSell;
    public int maxqtySpawnSell;
    public int itemExp;

    public enum ItemType {
        Raw,
        Admirable,
        Valuable
    }
    public enum RawTree {
        BigTree,
        SmallTree,
        Field,
        None
    }
    public enum ItemProd {
        Corps,
        Dairy,
        JuiceJamMaker,
        Kitchen,
        Bakery,
        CraftHouse,
        ChickenCoop,
        FishingSpotMountain,
        CowPasture,
        LunaMine,
        PigPen,
        FishingSpotLake,
        TropicalWood,
        SheepPasture,
        FishingSpotSea,
        Beebox,
        HomeIndustry,
        Merchant
    }
    public enum ItemLocation { 
        Home,
        Orchard,
        Forest
    }
    public enum ItemMerchant { 
        Margaret,
        Lucy,
        Bobby,
        Roger,
        Grace
    }
    public item (string name, int ID, string desc, int harvestx, int time, int stdpricex, int hightpricex, int stock, int Lvlunlockx, RawTree RawTree, ItemType type, ItemProd prod, string folderx, ItemLocation location, ItemMerchant merchant, int rate, int minspawnBuy, int maxspawnBuy, int minspawnSell, int maxspawnSell, int Exp) {
        itemName = name;
        itemID = ID;
        itemDesc = desc;
        harvest = harvestx;
        itemTime = time;
        stdprice = stdpricex;
        hightprice = hightpricex;
        itemStock = stock;
        Lvlunlock = Lvlunlockx;
        rawTree = RawTree;
        itemType = type;
        itemProd = prod;
        itemIcon = folderx;
        itemLocation = location;
        itemMerchant = merchant;
        spawnRate = rate;
        minqtySpawnBuy = minspawnBuy;
        maxqtySpawnBuy = maxspawnBuy;
        minqtySpawnSell = minspawnSell;
        maxqtySpawnSell = maxspawnSell;
        itemExp = Exp;
    }
    public item() {
    }
}

然后我将创建一个列表项：

public List<item> items = new List<item> ();

第一：如何更有效地将项目保存到播放器？

例如，我有字典上的数据：

public Dictionary <string, Dictionary <string, int> > productSellMargaret;

第二：如何更有效地保存产品SellMargaret给玩家？

我如何将它们都保存到playerprefs中，以便在退出游戏并使用continue数据再次玩游戏时继续调用数据？