Csharp/CSharp Tutorial/Reflection/Attributes

Get Custom Attributes

using System;
using System.Reflection;
class Program {
    static void Main(string[] args) {
        string assemblyName = "Your";
        try {
            Assembly a = Assembly.LoadFrom(assemblyName);
            object[] attributes = a.GetCustomAttributes(true);
            if (attributes.Length > 0) {
                Console.WriteLine("Assembly attributes for "{0}"...", assemblyName);
                foreach (object o in attributes)
                    Console.WriteLine("  {0}", o.ToString());
            } else
                Console.WriteLine("Assembly {0} contains no Attributes.", assemblyName);
        } catch (Exception ex) {
            Console.WriteLine(ex.ToString());
        }
    }
}

Using Reflection to get Custom Attributes

using System;
using System.Collections.Generic;
using System.Text;
    [AttributeUsage(AttributeTargets.Class |
                    AttributeTargets.Constructor |
                    AttributeTargets.Field |
                    AttributeTargets.Method |
                    AttributeTargets.Property,
                    AllowMultiple = true)]
    public class BugFixAttribute : System.Attribute
    {
        public BugFixAttribute(int bugID,string programmer,string date){
            this.BugID = bugID;
            this.Programmer = programmer;
            this.Date = date;
        }
        public int BugID;
        public string Date;
        public string Programmer;
        public string Comment { get; set; }
    }
    [BugFixAttribute(1, "A", "01/04/05",Comment = "value")]
    public class MyMath{
        public double DoFunc1(double param1)
        {
            return param1 + DoFunc2(param1);
        }
        public double DoFunc2(double param1)
        {
            return param1 / 3;
        }
    }
    public class Tester
    {
        public static void Main()
        {
            MyMath mm = new MyMath();
            System.Reflection.MemberInfo inf = typeof(MyMath);
            object[] attributes;
            attributes = inf.GetCustomAttributes(typeof(BugFixAttribute), false);
            foreach (Object attribute in attributes)
            {
                BugFixAttribute bfa = (BugFixAttribute)attribute;
                Console.WriteLine("\nBugID: {0}", bfa.BugID);
                Console.WriteLine("Programmer: {0}", bfa.Programmer);
                Console.WriteLine("Date: {0}", bfa.Date);
                Console.WriteLine("Comment: {0}", bfa.rument);
            }
        }
    }