I'm getting errors

Question

using System;

using SplashKitSDK;

public enum MenuOption

{

BuyStock,

SellStock,

QueryStock,

Quit

}

public class Program

{

private static void PerformStock(Stock stock)

{

int buy;

do

{

Console.WriteLine("Enter your items need to buy");

buy = Convert.ToInt32(Console.ReadLine());

stock.BuyStock(buy);

} while (false);

Console.WriteLine("Please enter a valid amount");

}

private static MenuOption ReadUserOption()

{

int option;

Console.WriteLine("********************************** ");

Console.WriteLine("******* Choose an option between [1-4]: ****** ");

Console.WriteLine("******** 1. Buy Stock ******* ");

Console.WriteLine("******** 2. Sell Stock ******* ");

Console.WriteLine("******** 3. Query Stock ******* ");

Console.WriteLine("*********4. Quit ******* ");

do

{

Console.Write("Choose an option:{1-4} : ");

try

{

option = Convert.ToInt32(Console.ReadLine());

}

catch

{

Console.WriteLine("Please enter a valid number:");

option = -1;

}

}

while (option < 1 || option > 4);

return(MenuOption)(option - 1);

}

public static void Main()

{

Stock stock = new Stock("Test Stock Item", 100);

/* test1.PrintSummary();

test1.AddStock(10);

test1.PrintSummary();

test1.PrintSummary();

Stock test2 = new Stock("New Stock", 200);

test2.PrintSummary();

test2.AddStock(10);

test2.PrintSummary();

test2.PrintSummary();*/

MenuOption userSelection;

do

{

userSelection = ReadUserOption();

switch (userSelection)

{

case MenuOption.BuyStock:

PerformStock(stock);

break;

case MenuOption.SellStock:

Console.WriteLine("Query Stock");

break;

case MenuOption.QueryStock:

Console.WriteLine("Query Stock");

break;

case MenuOption.Quit:

Console.WriteLine("Quit ......");

break;

}

} while (userSelection != MenuOption.Quit);

}

}

 

 

Program.cs(23,19): error CS1061: 'Stock' does not contain a definition for 'BuyStock' and no accessible extension method 'BuyStock' accepting a first argument of type 'Stock' could be found (are you missing a using directive or an assembly reference?) [C:\Users\User\Documents\Codes\StockManagement\StockManagement.csproj]

0 Warning(s)

1 Error(s)

Time Elapsed 00:00:02.14

 

 

I'm getting this error please help me to fix this error