Unity C# Player prefs does not contain a definition for ''?

Question

C++ / C#

I want to save and unload variables in the game, but the following error occurs
Unity C# Player prefs does not contain a definition for ''?
Here is the code

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class Clicker : MonoBehaviour

{
    [SerializeField] int money;
    public GameObject b1;
    public GameObject b2;
    public GameObject b3;
    public GameObject b4;
    public int bonusplus = 2;
    public int bonusplus2 = 7;
    public Text moneyText;
    public int bonus = 1;
    public int autoclickbonus2 = 0;
    private void Update()
    {
        moneyText.text = money.ToString();
        SaveGame();
    }
    public void SaveGame()
    {
        PlayerPrefs.bonusplus("bonusplus", bonusplus);
        PlayerPrefs.bonusplus2("bonusplus2", bonusplus2);
        PlayerPrefs.bonus("bonus", bonus);
        PlayerPrefs.money("money", money);
        PlayerPrefs.autoclickbonus21("autoclickbonus2", autoclickbonus2);

        PlayerPrefs.Save();
        Debug.Log("Game data saved!");
    }
    public void LoadGame()
    {
        bonusplus = PlayerPrefs.GetInt("bonusplus");
        bonusplus2 = PlayerPrefs.GetInt("bonusplus2");
        bonus = PlayerPrefs.GetInt("bonus");
        autoclickbonus2 = PlayerPrefs.GetInt("autoclickbonus2");
        money = PlayerPrefs.GetInt("money");
        Debug.Log("Game data loaded!");
    }
    private void Start()
    {
        LoadGame();
    }
    public void ToShop()
    {
        SceneManager.LoadScene(1);
    }

    public void Return()
    {
        SceneManager.LoadScene(0);
    }
    public void ButtonClick()
    {
        StartCoroutine(Click());
        PlayerPrefs.SetInt("money,", money);
    }
    public void Buy()
    {
        if (money >= 300)
        {


            bonus += bonusplus;
            money -= 300;
            b1.SetActive(false);
        }
        else
        {
            Debug.Log("Not enough money");
        }
    }
    public void Buy2()
    {
        if (money >= 900)
        {
            b2.SetActive(false);
            bonus += bonusplus2;
            money -= 900;
        }
        else
        {
            Debug.Log("Not enough money");
        }
    }
     public void Buy3()
    {
        if (money >= 3000)
        {
            b3.SetActive(false);
            StartCoroutine(IdleFarm());
            money -= 3000;
        }
        else
        {
            Debug.Log("Not enough money");
        }
    }
    public void Buy4()
    {
        if (money >= 4000)
        {
            b4.SetActive(false);
            autoclickbonus2 += 4;
            money -= 4000;
        }
        else
        {
            Debug.Log("Not enough money");
        }
    }
    IEnumerator IdleFarm()
    {
        yield return new WaitForSeconds(1);
        money += autoclickbonus2;
        Debug.Log(money);
        StartCoroutine(IdleFarm());
    }
    IEnumerator Click()
    {
        money += bonus;
        yield return new WaitForSeconds(1.5f);
    }
}

Answer 1

I don’t remember that in PlayerPrefs you could write like this

PlayerPrefs.bonusplus("bonusplus", bonusplus);
        PlayerPrefs.bonusplus2("bonusplus2", bonusplus2);
        PlayerPrefs.bonus("bonus", bonus);
        PlayerPrefs.money("money", money);
        PlayerPrefs.autoclickbonus21("autoclickbonus2", autoclickbonus2);

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