C#编译出错，不知哪里的问题

using System;
using namespace FileApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                // 创建一个 StreamReader 的实例来读取文件
                // using 语句也能关闭 StreamReader
                using (StreamReader sr = new StreamReader("names.txt"))
                {
                    string line;

                    // 从文件读取并显示行，直到文件的末尾
                    while ((line = sr.ReadLine()) != null)
                    {
                        Console.WriteLine(line);
                    }
                }
            }
            catch (Exception e)
            {
                // 向用户显示出错消息
                Console.WriteLine("The file could not be read:");
                Console.WriteLine(e.Message);
            }
            Console.ReadKey();
        }
    }
}