var config = new MapperConfiguration(cfg =>
{
    cfg.CreateMissingTypeMaps = true;

private IServiceProvider IocConfig(IServiceCollection services)
        {
            var container = new Container();
            container.Configure(config =>
            {
                //config.Populate(services); ---> اضافی است
            });
            container.Populate(services);
            return container.GetInstance<IServiceProvider>();
        }

var user = db.Users.FirstOrDefault(x=>x.UserName == "hamid");

db.Post.Add(new Post
{
      Title = txtTitle.Text,
      Content = txtContent.Text,
      User = user
}
db.SaveChanges();

<meta http-equiv="Content-Type" content="text/html; charset=windows-1256">

using (var client = new WebClient { Encoding = Encoding.GetEncoding("windows-1256") })

public ActionResult Index()
{
    var products = new Products();
    return View(products);  
}

var code = new Guid(inputGuid);

using System.Net;
//...
var content = new WebClient { Encoding = Encoding.UTF8 }.DownloadString(url);

var rpt = new IListPdfReport().CreatePdfReport();