(1)namespace ClassLibrarySport

{

    public abstract class Sport

    {

        protected string name;

        public abstract string GetName();

        public abstract string GetDuration();

    }

}

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(2)namespace ClassLibrarySomeSports//该项目添加了对(1)的引用

{

    public class Football : ClassLibrarySport.Sport

    {

        public Football()

        {

            name = "Football";

        }

        public override string GetName()

        {

            return name;

        }

        public override string GetDuration()

        {

            return "four 15 minute quarters";

        }

    }

}

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(3)namespace ConsoleAssemblyTest//该项目添加了对(1)的引用

{

    class Program

    {

        static void Main(string[] args)

        {

            Assembly assembly = Assembly.LoadFrom(@"E:\ClassLibrarySomeSports\

bin\Debug\ClassLibrarySomeSports.dll");

            Type[] types = assembly.GetTypes();

            Console.WriteLine("Get Type From ClassLibrarySomeSports.dll:");

            for (int i = 0; i < types.Length; i++)

            {

                Console.WriteLine(types[i].Name);

            }

            //使用GetConstructor()方法获取对应类型的构造器，从而构造出该类型的对象

            Console.WriteLine("Use Method GetConstructor():");

            ConstructorInfo ci = types[0].GetConstructor(new Type[0]);

            ClassLibrarySport.Sport sport = (ClassLibrarySport.Sport)ci.Invoke(new object[0]);

            Console.WriteLine(sport.GetName() + " has " + sport.GetDuration());

            //使用Activator.CreateInstance()方法构造出该类型的对象

//使用assembly.CreateInstance()返回为null，？？

            Console.WriteLine("Use Method CreateInstance():");

            ClassLibrarySport.Sport sport1 = (ClassLibrarySport.Sport)

Activator.CreateInstance(types[0]);

            Console.WriteLine(sport1.GetName() + " has " + sport1.GetDuration());

            //反射指定类型中的名称为“GetDuration”的方法，通过Invoke()方法执行该方法

            object objSport = Activator.CreateInstance(types[0]);

            MethodInfo method = types[0].GetMethod("GetDuration");

            object o = method.Invoke(objSport, new object[0]);

            Console.WriteLine(o as string);

            Console.Read();

        }

    }

}

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Output:

Get Type From ClassLibrarySomeSports.dll:

Football

Use Method GetConstructor():

Football has four 15 minute quarters

Use Method CreateInstance():

Football has four 15 minute quarters

four 15 minute quarters

http://www.cnblogs.com/KissKnife/archive/2006/08/13/475717.html