var formData = new FormData();
var splitedKeywords = $('#keywords').val().split(',');
formData.append('Keywords', JSON.stringify(splitedKeywords));

"\"کلمه اول\",\"کلمه دوم\""

var formData = new FormData();
var splitedKeywords = $('#keywords').val().split(',');
for (var counter = 0; counter < splitedKeywords.length; counter++) {
    formData.append('Keywords', JSON.stringify(splitedKeywords[counter]));
}

pulbic class User
{
    public int Id { get; set; }
    public string FullName { get; set; }
    public ICollection<Comment> Comments { get; set; }
}
public class Comment
{
    public int Id { get; set; }
    public string Text { get; set; }
    public int UserId { get; set; }
    public int? UserId2 { get; set; }
    
    [ForeignKey(nameof(UserId))
    public virtual User User { get; set; }
    [ForeignKey(nameof(UserId2))
    public virtual User User2 { get; set; }
}

var query = _context.Products.Select(x => new { x.Status.ToString(), ... });

"Status": { type: "string" },

field: "Status",
    values: [
    { text: "در حال بررسی", value: "Checking" },
    { text: "تایید شده", value: "Accepted" },
    { text: "رد شده", value: "Rejected" },
],
title: 'وضعیت'

bundles.Add(new StyleBundle("~/Content/Css").Include(
                    //Bootstrap 3.3.7
                    //"~/content/application/AdminLTE/dist/css/bootstrap-theme.css",
                    Links.Content.application.AdminLTE.dist.css.bootstrap_theme_css
                    .
                    .
                    .
                ));