.Net反射-MethodInfo

Main方法：

        static async Task Main(string[] args)
        {
            Type personType = typeof(Person);
            var person = Activator.CreateInstance(personType);
            //调用同步方法,如果有同名方法，必须带方法参数Type数组
            object returnValue1 = personType.GetMethod("Say", new Type[] { }).Invoke(person, new object[] { });//hi

            //调用同步带参数方法
            object returnValue2 = personType.GetMethod("Say", new Type[] { typeof(string) }).Invoke(person, new object[] { "fan" });//hi,fan

            //调用异步方法
            var asyncMethod = personType.GetMethod("SayAsync", new Type[] { });
            var task = asyncMethod.Invoke(person, new object[] { }) as Task;
            await task;
            object result = task.GetType().GetProperty("Result").GetValue(task, null); //async hi

            //获取方法参数列表
            ParameterInfo[] paras=asyncMethod.GetParameters();
        }

Person类：

public class Person
    {
        public string Say()
        {
            return "async hi";
        }
        public string Say(string name)
        {
            return "hi," + name;
        }
        public async Task<string> SayAsync()
        {
            var result = await Task.Run<string>(() => "async hi");
            return result;
        }
    }