using System;

public class Program

{

    public static void Main()

    {

        PrintVehicleInfo(typeof(Motorcycle));

        PrintVehicleInfo(typeof(HorseAndBuggy));

        PrintVehicleInfo(typeof(Winnebago));

    }

    private static void PrintVehicleInfo(System.Type t)

    {

        System.Console.WriteLine("Vehicle information for {0}", t);

​

        // Using reflection.

        System.Attribute[] attrs = System.Attribute.GetCustomAttributes(t);  // Reflection. 

​

        // Displaying output. 

        foreach (System.Attribute attr in attrs)

        {

            if (attr is VehicleDescriptionAttribute)

            {

                VehicleDescriptionAttribute a = (VehicleDescriptionAttribute)attr;

                System.Console.WriteLine("  Description: {1:f}", a.TypeId, a.Description);

            }

        }

    }

}

​

​

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, 

                Inherited = false)] 

public sealed class VehicleDescriptionAttribute : System.Attribute 

{ 

  public string Description { get; set; } 

  public VehicleDescriptionAttribute(string vehicalDescription) 

  {  

    Description = vehicalDescription; 

  } 

  public VehicleDescriptionAttribute(){ } 

} 

​

// Assign description using a "named property." 

[Serializable] 

[VehicleDescription(Description = "My rocking Harley")] 

public class Motorcycle 

{ 

} 

[SerializableAttribute] 

[ObsoleteAttribute("Use another vehicle!")] 

[VehicleDescription("The old gray mare, she ain't what she used to be...")] 

public class HorseAndBuggy 

{ 

} 

[VehicleDescription("A very long, slow, but feature-rich auto")] 

public class Winnebago 

{ 

}