using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        EnumDemo();

    }

    private static void EnumDemo()

    {

        string[] lines =

        {

            "1,Product1,Beverages, 11",

            "2,Product2,Produce, 19",

            "3,Product3,DairyProducts, 4",

            "4,Product3,DAIRYPRODUCTS, 9",

            "5,Product4,DairyProdccts, 8",

            "6,Product5,beverages, 6"

        };

​

        var linesSplit = lines.Select(line => line.Split(',')).ToArray();

​

        var categories = Enum.GetNames<Category>();

        foreach (var current in linesSplit)

        {

            if (current is not [ _ ,  _ , var maybeCategory, var amount]) continue;

            if (categories.Contains(maybeCategory, StringComparer.OrdinalIgnoreCase))

            {

                Enum.TryParse(current[2], true, out Category category);

                Console.WriteLine($"{current[0],-5}{current[2].PadRight(20,'.')} is valid {Convert.ToInt32(amount),10:D2}");

            }

            else

            {

                Console.WriteLine($"{current[0],-5}{current[2].PadRight(20, '.')} is not valid");

            }

​

        }

    }   

}

public enum Category

{

    Beverages,

    DairyProducts,

    GrainsCereals,

    Produce

}