Custom Attributes (edit)

Tutorial: Use attributes - C# | Microsoft Docs

Writing Custom Attributes | Microsoft Docs

 public static object GetPropValue(object src, string propName)
 {
     return src.GetType().GetProperty(propName).GetValue(src, null);
 }

DateTime now = DateTime.Now;
int min = GetPropValue<int>(now, "TimeOfDay.Minutes");
int hrs = now.GetPropValue<int>("TimeOfDay.Hours");

namespace ConsoleApp1
{
 public class Book
 {
 [Author("AuthorName")]
 public string Name
 {
 get; private set;
 }
 }

 [AttributeUsage(AttributeTargets.Class | AttributeTargets.GenericParameter | AttributeTargets.Method | AttributeTargets.Field | AttributeTargets.Parameter | AttributeTargets.Property)]
 public class AuthorAttribute : Attribute
 {
 public AuthorAttribute(string name)
 {
 this._Name = name;
 }

 private string _Name;

 public string Name
 {
 get { return this._Name; }
 set { this._Name = value; }
 }
 }

 class Program
 {
 private static void Main(string[] args)
 {
 GetAuthors();

 Environment.Exit(-1);
 }
 
 private static Dictionary<string, string> GetAuthors()
 {
 Dictionary<string, string> _dict = new Dictionary<string, string>();

 PropertyInfo[] props = typeof(Book).GetProperties();
 foreach (PropertyInfo prop in props)
 {
 object[] attrs = prop.GetCustomAttributes(true);
 foreach (object attr in attrs)
 {
 AuthorAttribute authAttr = attr as AuthorAttribute;
 if (authAttr != null)
 {
 string propName = prop.Name;
 string auth = authAttr.Name;

 _dict.Add(propName, auth);
 }
 }
 }

 return _dict;
 }
 }
}