[Unity] Use the Attribute feature for enumerations to map enumeration values to strings

         We often use enumeration values ​​during game development. If we want to get a specific string description during an enumeration, we may achieve it in the following way.

1. Implementation through map mapping

public enum CharacterStatusType
{
    None,
    Silence,
    Stun,
    Weakness,
    Knockdown
}


public static Dictionary<CharacterStatusType, string> statusTypeToString = new Dictionary<CharacterStatusType, string>()
{
    { CharacterStatusType.None, "无异常状态" },
    { CharacterStatusType.Silence, "沉默状态" },
    { CharacterStatusType.Stun, "眩晕" },
    { CharacterStatusType.Weakness, "虚弱" },
    { CharacterStatusType.Knockdown, "击倒" }
};

But in this way, each enumeration value has to be written twice, which is not elegant enough, so I plan to implement it in another way.

2. Implementation using Attribute characteristics.

using System;
using System.ComponentModel;

/// <summary>
/// 枚举特性(Attribute)
/// 
/// 示例：
/// 1.定义：
///public enum MovementDirection
///{
///    [Description("向前方移动")]
///    Forward,
///    [Description("向后方移动")]
///    Backward
///}
///public enum CharacterStatusType
///{
///    [Description("无异常状态")]
///    None,
///    [Description("沉默状态")]
///    Silence,
///    [Description("眩晕")]
///    Stun,
///    [Description("虚弱")]
///    Weakness,
///    [Description("击倒")]
///    Knockdown
///}
/// 2.使用：
/// CharacterStatusType status = CharacterStatusType.Silence;
/// string statusString = status.GetDescription();
/// MovementDirection direction = MovementDirection.Forward;
/// string directionString = direction.GetDescription();
/// 
/// </summary>
public static class EnumExtensions
{
    public static string GetDescription<TEnum>(this TEnum enumValue) where TEnum : Enum
    {
        var type = typeof(TEnum);
        var field = type.GetField(enumValue.ToString());
        if (field != null)
        {
            var attributes = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (attributes.Length > 0)
            {
                return ((DescriptionAttribute)attributes[0]).Description;
            }
        }

        return enumValue.ToString();
    }
}

This makes it much more convenient to use. You can just add any information you want to associate with the enumeration, and it is also very convenient to call.