自定义树形定义

 public class AuthorAttribute : Attribute
    {
        public AuthorAttribute(String Description_in)
        {
            //
            // TODO: Add constructor logic here
            this.description = Description_in;
            //
        }
        protected String description;
        public String Description
        {
            get
            {
                return this.description;

            }
        }
    }

Book类定义，使用属性

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

vs2019完整代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System;
using System.Reflection;
using System.Diagnostics;


namespace ConsoleApp1
{
    //our custom attribute class
    public class AuthorAttribute : Attribute
    {
        public AuthorAttribute(String Description_in)
        {
            //
            // TODO: Add constructor logic here
            this.description = Description_in;
            //
        }
        protected String description;
        public String Description
        {
            get
            {
                return this.description;

            }
        }
    }

    public class Book
    {
        [Author("AuthorName")]
        public string Name
        {
            get; private set;
        }
    }
    class Hello
    {
        public 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.Description;

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

            return _dict;
        }


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

            Console.WriteLine("Hello World!");
        }
    }
}

参考链接:
https://stackoverflow.com/questions/6637679/reflection-get-attribute-name-and-value-on-property