In C please also please try to be detail in your explanation

In C# please, also please try to be detail in your explanation so I can follow your directions. *please instruct where the text file should be put* main reason why I\'m having hard time having this problem to work. Thanks

Create a program that stores student grades in a text file. The fileshould contain the name, ID number, class taken and grade of every student. Allow the user to load a grade file and display its contents in a read-only TextBox . The entries should be displayed in thefollowing format:
LastName, FirstName: ID# Class Grade

We list some sample data below:
Jones, Bob: 1 \"Introduction to Computer Science\" \"A-\"
Johnson, Sarah: 2 \"Data Structures\" \"B+\"
Smith, Sam: 3 \"Data Structures\" \"C\"

Solution

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;//Mandatory to access System I/O functionality

namespace Assignment5
{
    class Program
    {
        static void Main(string[] args)
        {

            MenuMethod();
        }

          //************************* Menu Method **********************************
        private static void MenuMethod()
        {
            string pathName = Directory.GetParent(Directory.GetCurrentDirectory()).Parent.FullName; //updates the current working path as Path Name
            string fileName = \"GradeFile.txt\"; //declare the file name

            int choice = 0;

            while (choice != 2) //menu
            {
                Console.WriteLine(\"+++++++++++++++++++++++++++\");
                Console.WriteLine(\"+           Menu          +\");
                Console.WriteLine(\"+     1.Display Grades    +\");
                Console.WriteLine(\"+     2.Exit              +\");
                Console.WriteLine(\"+++++++++++++++++++++++++++\");
                Console.Write(\"Enter your choice: \");

                //Try-catch Block for handling Exceptions
                try
                {
                    choice = Convert.ToInt32(Console.ReadLine());
                }
                catch (Exception error)
                {
                    choice = 0;
                    Console.WriteLine(error.Message);
                }

                switch (choice)
                {
                    case 1:
                        WriteFileMethod(pathName, fileName); //created the text file
                        CheckFile(); //check file if exist
                        ReadFileMethod(pathName, fileName); //display the file on console
                        break;
                    case 2://select to exit
                        Console.WriteLine();
                        break;
                    default: //display incorrect input message
                        Console.WriteLine();
                        Console.WriteLine(\"Incorrect input, please try again!\");
                        Console.WriteLine();
                        WaitForKey(); //if incorrect input, then display wait for key info
                        break;
                }
                Console.Clear(); //clear the screen

            }
        }

            //CheckFile Method++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
        private static void CheckFile()
        {
            string prompt;
            Console.Write(\"Please enter a file name: \");
            prompt = Console.ReadLine();
            Console.WriteLine();

            if (File.Exists(prompt))
            {
                Console.WriteLine(\"The File Exists\");
                Console.WriteLine();
                Console.WriteLine(\"File Stats:\");
                Console.WriteLine(\"+++++++++++++++++++++++++++++++++++++++++\");
                Console.WriteLine(\"Create Time: \" + File.GetCreationTime(prompt));
                Console.WriteLine(\"Last Access: \" + File.GetLastAccessTime(prompt));
                Console.WriteLine(\"Last Write : \" + File.GetLastWriteTime(prompt));
                Console.WriteLine(\"+++++++++++++++++++++++++++++++++++++++++\");

            }
            else
            {
                Console.WriteLine(\"No such file\");
            }
            WaitForKey();
        }

        //WriteFile Method++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
        private static void WriteFileMethod(string pathName, string fileName)
        {

            try
            {
                FileStream outFile = new FileStream(pathName + fileName, FileMode.Create, FileAccess.Write); //created outFile in current path
                StreamWriter writer = new StreamWriter(outFile); //declares a Write Variable

                //Arrays Information
                string[] firstName = { \"Jones\", \"Johnson\", \"Smith\" };
                string[] lastName = { \"Bob\", \"Sarah\", \"Sam\" };
                int[] ID = { 1, 2, 3 };
                string[] classes = { \"Introduction to Computer Science\", \"Data Structures\", \"Data Structures\" };
                string[] grade = { \"A-\", \"B+\", \"C\" };

                //write data to the outFIle
                for (int i = 0; i < 3; i++)
                {
                    writer.WriteLine(\"{0}, {1}: {2} {3}, {4}\", firstName[i], lastName[i], ID[i], classes[i], grade[i]);
                }

                writer.Close(); // closes the file
                outFile.Close(); // closes the file stream
            }
            catch (Exception error)
            {
                Console.WriteLine(\"Your code caused an error!!!\");
                Console.WriteLine(\"Error: {0} \", error.Message);
            }
        }

        //ReadFile Method++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
        private static void ReadFileMethod(string pathName, string fileName)
        {
            string fileData = \"\";
            string[] fileArray = new string[10];
            try
            {
                FileStream inFile = new FileStream(pathName + fileName, FileMode.Open, FileAccess.Read);
                StreamReader reader = new StreamReader(inFile);

                for (int row = 0; row < 10; row++)
                {
                    fileData = reader.ReadLine();
                    fileArray[row] = fileData;

                    Console.WriteLine(\"Your Data: {0}\", fileData);
                } // Read one record (line of data)
                reader.Close(); // closes the file
                inFile.Close(); // closes the file stream
            }
            catch (Exception error)
            {
                Console.WriteLine(\"Your code caused an error!!!\");
                Console.WriteLine(\"Error: {0} \", error.Message);

            }
        }

        // UTILITY METHODS++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
        private static void WaitForKey()
        {
            Console.WriteLine();
            Console.WriteLine(\"++++++++++++++++++++++++++++++++++\");
            Console.WriteLine(\"Press any key to continue...\");
            Console.WriteLine(\"++++++++++++++++++++++++++++++++++\");
            Console.ReadKey();
            Console.Clear();
        }

    }
}

GradeFile.txt

Jones, Bob: 1 Introduction to Computer Science, A-
Johnson, Sarah: 2 Data Structures, B+
Smith, Sam: 3 Data Structures, C