using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Reflection;

​

// https://stackoverflow.com/questions/47893236/how-to-get-an-ienumerablestring-of-enum-values-attributes

​

    public class StringValueAttribute : Attribute

    {

        public string Value { get; private set; }

​

        public StringValueAttribute(string value)

        {

            Value = value;

        }

    }

​

    enum Group

    {

        [StringValue("Computer Science")]

        ComputerScience,

​

        [StringValue("Software Engineering")]

        SoftwareEngineering,

​

    }

​

    public static class EnumExtensions

    {

        public static IEnumerable<string> GetStringValues<TEnum>() where TEnum : struct, IConvertible, IComparable, IFormattable

        {

            return Enum.GetValues(typeof(TEnum))

                .Cast<Enum>()

                .Select(e => e.GetStringValue())

                .ToList();

        }

​

        public static IEnumerable<string> GetStringValuesOfType(Enum value)

        {

            return Enum.GetValues(value.GetType())

                .Cast<Enum>()

                .Select(e => e.GetStringValue())

                .ToList();

        }

        public static string GetStringValue(this Enum value)

        {

            Type type = value.GetType();

            FieldInfo fieldInfo = type.GetField(value.ToString());

            StringValueAttribute[] attributes = fieldInfo.GetCustomAttributes(typeof(StringValueAttribute), false) as StringValueAttribute[];

​

            string stringValue = null;

            if (attributes.Length > 0)

            {

                stringValue = attributes[0].Value;

            }

​

            return stringValue;

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var values = EnumExtensions.GetStringValues<Group>();

            values.Dump();

        }

    }

​

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: " + Environment.Version);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​

    public class AssertionFailedException : System.Exception

    {

        public AssertionFailedException() : base() { }

​

        public AssertionFailedException(string s) : base(s) { }

    }

​

    public static class Assert

    {

        public static void IsTrue(bool value)

        {

            IsTrue(value, "failed");

        }

​

        public static void IsTrue(bool value, string message)

        {

            if (value == false)

                throw new AssertionFailedException(message ?? "failed");

        }

    }

​