❔ build failed. error

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Giraffe
{
    class Program
    {
        static void Main(string[] args)
        {

            Console.WriteLine("Finding address...");
            Console.ReadLine();

        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Giraffe
{
    class Program
    {
        static void Main(string[] args)
        {

            Console.WriteLine("Finding address...");
            Console.ReadLine();

        }
    }
}