strange

# App
using System;
using ClassLibrary1;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            LibClass c = new LibClass();
            c.Test();
            Console.WriteLine("Hello World!");
        }
    }
}

# Lib

using System;

namespace ClassLibrary1
{
    public class LibClass
    {
        public void Test()
        {
            Console.WriteLine("exd");
        }
    }
}