invoking a method with struct parameter using reflection in c#

I created a Class Library project like this

namespace ClassLibrary1
{
    public class Class1
    {
        public string Method1(int x, string[] y)
        {
            if (x < 100)
            {
                return y[0];
            }
            else
            {
                return y[1];
            }
        }
    }
}

then, I created a Console App project and invoked Method1 using reflection like this

using System;
using System.Reflection;
using System.Collections.Generic;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<object> list = new List<object>();
            list.Add(5);
            string[] x = new string[2] { "N", "F" };
            list.Add(x);
            object output = null;
            string DllFile = @"C:\Users\lenovo\source\repos\ClassLibrary1\ClassLibrary1\bin\Debug\ClassLibrary1.dll";
            Assembly assembly = Assembly.LoadFrom(DllFile);
            var types = assembly.GetTypes();
            foreach (var j in types)
            {
                object l = j.InvokeMember(null, BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.CreateInstance, null, null, null);
                output = j.InvokeMember("Method1", BindingFlags.InvokeMethod, null, l, list.ToArray());
            }
            Console.WriteLine(output);
            Console.ReadLine();
        }
    }
}

I did them successfully. Now, I'm trying to invoke Method1 that gets a struct variable as parameter using reflection. Actually, I'm trying to invoke Method1 in below code

namespace ClassLibrary1
{
    public struct Person
    {
        public int personId;
        public string firstName;
        public string lastName;
    }
    public class Class1
    {
        public string Method1(int x, Person y)
        {
            if (x < 100)
            {
                return y.firstName;
            }
            else
            {
                return y.lastName;
            }
        }
    }
}

I saw some samples and tryed them but I failed. I get an Exception every time

System.MissingMethodException: 'Method 'ClassLibrary1.Class1.Method1' not found.'

Can someone help me? what is the problem with this Exception? In my first attempt, I did not get such Exception.

Edit: below code is my attempt for invoking Method1 that gets a struct variable as parameter using reflection

using System;
using System.Reflection;
using System.Collections.Generic;

namespace ConsoleApp1
{
    public struct Person
    {
        public int personId;
        public string firstName;
        public string lastName;
    }
    class Program
    {
        static void Main(string[] args)
        {
            List<object> list = new List<object>();
            list.Add(5);
            Person x = new Person();
            x.personId = 1;
            x.firstName = "N";
            x.lastName = "F";
            list.Add(x);
            object output = null;
            string DllFile = @"C:\Users\lenovo\source\repos\ClassLibrary1\ClassLibrary1\bin\Debug\ClassLibrary1.dll";
            Assembly assembly = Assembly.LoadFrom(DllFile);
            var types = assembly.GetTypes();
            foreach (var j in types)
            {
                object l = j.InvokeMember(null, BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.CreateInstance, null, null, null);
                output = j.InvokeMember("Method1", BindingFlags.InvokeMethod, null, l, list.ToArray());
            }
            Console.WriteLine(output);
            Console.ReadLine();
        }
    }
}