// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002803/assembly-getcustomattribute

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Reflection;

​

[assembly: AssemblyDescription("A sample description")]

namespace ExtensionMethods

{

    public class Program

    {

        public static void Main()

        {

            Type clsType = typeof(Program);

​

            Assembly assy = clsType.Assembly;

​

            String assyName = assy.GetName().Name;

​

            bool isdef = assy.IsDefined(typeof(AssemblyDescriptionAttribute));

​

            if (isdef)

            {

                Console.WriteLine("The AssemblyDescription attribute is defined for assembly {0}.", assyName);

​

                //C# Extension Method: Assembly - GetCustomAttribute

                AssemblyDescriptionAttribute adAttr = (AssemblyDescriptionAttribute)assy.GetCustomAttribute(typeof(AssemblyDescriptionAttribute));

​

                if (adAttr != null)

                    Console.WriteLine("The description is \"{0}\".", adAttr.Description);

                else

                    Console.WriteLine("The description could not be retrieved.");

            }

            else

                Console.WriteLine("The AssemblyDescription attribute is not defined for assembly {0}.", assyName);

        }

    }

}