Program.cs

// the ourAnimals array will store the following: 
string animalSpecies = "";
string animalID = "";
string animalAge = "";
string animalPhysicalDescription = "";
string animalPersonalityDescription = "";
string animalNickname = "";

// variables that support data entry
int maxPets = 8;
string? readResult;
string menuSelection = "";

// array used to store runtime data, there is no persisted data
string[,] ourAnimals = new string[maxPets, 6];

// TODO: Convert the if-elseif-else construct to a switch statement

// create some initial ourAnimals array entries
for (int i = 0; i < maxPets; i++)
{
    if (i == 0)
    {
        animalSpecies = "dog";
        animalID = "d1";
        animalAge = "2";
        animalPhysicalDescription = "medium sized cream colored female golden retriever weighing about 65 pounds. housebroken.";
        animalPersonalityDescription = "loves to have her belly rubbed and likes to chase her tail. gives lots of kisses.";
        animalNickname = "lola";
    }
    else if (i == 1)
    {
        animalSpecies = "dog";
        animalID = "d2";
        animalAge = "9";
        animalPhysicalDescription = "large reddish-brown male golden retriever weighing about 85 pounds. housebroken.";
        animalPersonalityDescription = "loves to have his ears rubbed when he greets you at the door, or at any time! loves to lean-in and give doggy hugs.";
        animalNickname = "loki";
    }
    else if (i == 2)
    {
        animalSpecies = "cat";
        animalID = "c3";
        animalAge = "1";
        animalPhysicalDescription = "small white female weighing about 8 pounds. litter box trained.";
        animalPersonalityDescription = "friendly";
        animalNickname = "Puss";
    }
    else if (i == 3)
    {
        animalSpecies = "cat";
        animalID = "c4";
        animalAge = "?";
        animalPhysicalDescription = "";
        animalPersonalityDescription = "";
        animalNickname = "";
    }
    else
    {
        animalSpecies = "";
        animalID = "";
        animalAge = "";
        animalPhysicalDescription = "";
        animalPersonalityDescription = "";
        animalNickname = "";
    }

    ourAnimals[i, 0] = "ID #: " + animalID;
    ourAnimals[i, 1] = "Species: " + animalSpecies;
    ourAnimals[i, 2] = "Age: " + animalAge;
    ourAnimals[i, 3] = "Nickname: " + animalNickname;
    ourAnimals[i, 4] = "Physical description: " + animalPhysicalDescription;
    ourAnimals[i, 5] = "Personality: " + animalPersonalityDescription;
}

do
{
    // display the top-level menu options

    //Comment out Console.Clear() if you run into issues with debugging your application
    Console.Clear();

    Console.WriteLine("Welcome to the Contoso PetFriends app. Your main menu options are:");
    Console.WriteLine(" 1. List all of our current pet information");
    Console.WriteLine(" 2. Add a new animal friend to the ourAnimals array");
    Console.WriteLine(" 3. Ensure animal ages and physical descriptions are complete");
    Console.WriteLine(" 4. Ensure animal nicknames and personality descriptions are complete");
    Console.WriteLine(" 5. Edit an animal’s age");
    Console.WriteLine(" 6. Edit an animal’s personality description");
    Console.WriteLine(" 7. Display all cats with a specified characteristic");
    Console.WriteLine(" 8. Display all dogs with a specified characteristic");
    Console.WriteLine();
    Console.WriteLine("Enter your selection number (or type Exit to exit the program)");

    readResult = Console.ReadLine();
    if (readResult != null)
    {
        menuSelection = readResult.ToLower();
    }

    //Console.WriteLine($"You selected menu option {menuSelection}.");
    //Console.WriteLine("Press the Enter key to continue");

    // pause code execution
    //readResult = Console.ReadLine();

    switch (menuSelection)
    {
        case "1":
            // List all of our current pet information
            Console.WriteLine("this app feature is coming soon - please check back to see progress.");
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
        case "2":
            // Add a new animal friend to the ourAnimals array
            Console.WriteLine("this app feature is coming soon - please check back to see progress.");
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
        case "3":
            Console.WriteLine("Challenge Project - please check back soon to see progress.");
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
        case "4":
            Console.WriteLine("Challenge Project - please check back soon to see progress.");
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
        case "5":
            Console.WriteLine("UNDER CONSTRUCTION - please check back next month to see progress.");
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
        case "6":
            Console.WriteLine("UNDER CONSTRUCTION - please check back next month to see progress.");
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
        case "7":
            Console.WriteLine("UNDER CONSTRUCTION - please check back next month to see progress.");
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
        case "8":
            Console.WriteLine("UNDER CONSTRUCTION - please check back next month to see progress.");
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
        default:
            Console.WriteLine("Press the Enter key to continue.");
            readResult = Console.ReadLine();
            break;
    }
} while (menuSelection != "exit");