/// <summary>
/// get <typeparamref name="TAttribute"/> attribute declared on <paramref name="this"/>
/// </summary>
/// <typeparam name="TEnum"></typeparam>
/// <typeparam name="TAttribute"></typeparam>
/// <param name="this"></param>
/// <param name="defaultAttribute"></param>
/// <returns></returns>
public static TAttribute?GetAttribute <TEnum, TAttribute>(this TEnum @this, TAttribute?defaultAttribute = default)
where TEnum : struct, Enum
where TAttribute : Attribute => TypeCache <TEnum> .GetAttributes <TAttribute>(@this)
.FirstOrDefault() ?? defaultAttribute;
/// <summary>
/// get <typeparamref name="TAttribute"/> attributes declared on <paramref name="this"/>
/// </summary>
/// <typeparam name="TEnum"></typeparam>
/// <typeparam name="TAttribute"></typeparam>
/// <param name="this"></param>
/// <returns></returns>
public static IEnumerable <TAttribute> GetAttributes <TEnum, TAttribute>(this TEnum @this)
where TEnum : struct, Enum
where TAttribute : Attribute => TypeCache <TEnum> .GetAttributes <TAttribute>(@this);