Program.cs

Like C# console applications, ASP.NET Core has the Program class, which is an important class that contains the entry point to the application. The file has the Main() method used to run the application and it is used to create an instance of WebHostBuilder for creating a host for the application. The Startup class to be used by the application is specified in the Main method:

 public class Program
 {
        public static void Main(string[] args)
        {
            BuildWebHost(args).Run();
        }

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .Build();
    }