if (Request.IsAjaxRequest())
{
    var messs1 = db.Messages
     .Where(m => m.UserAddressat.Id == us.Id && m.UserAuthor.Name == User.Identity.Name)
     .ToList();

    var messs2 = db.Messages
     .Where(m => m.UserAddressat.Name == User.Identity.Name && m.UserAuthor.Id == id)
     .ToList();

    MessagingModel model2 = new MessagingModel();

    model2.OldMessages = messs1.Union(messs2)
     .OrderByDescending(s => s.CreatedDate)
     .Skip(20)
     .Take(20)
     .Reverse();

    return PartialView("_Messaging", model2);
}

@model BloodBank.Models.MessagingModel

@if (Model.OldMessages != null)
{
    foreach (var message in Model.OldMessages)
    {
        if (message.UserAuthor.Name == User.Identity.Name)
        {
            <p>
                <b style="float:left">@message.UserAuthor.Name  @message.UserAuthor.Lastname: </b>
                <div class="MessTo">
                    @message.Value <br /> <i class="messageDateDiv">@message.CreatedDate.ToUniversalTime()</i>
                </div>
            </p>
        }
        else
        {
            <p>
                <b style="float:left">@message.UserAuthor.Name  @message.UserAuthor.Lastname: </b>
                <div class="MessFrom">
                    @message.Value  <br /><i class="messageDateDiv">@message.CreatedDate.ToUniversalTime()</i>
                </div>

            </p>
        }
    }
}