@Html.ActionLink("Add Related Data","Add",new { @id=364})

public class ChildDetails
{
  public int ID { set;get;}
  public string Note { set;get;}
  public int ParentID { set;get;}
  public string ParentName { set;get;}
}

public ActionResult Add(int id)
{
  var parent=yourRepositary.Get(id);
  ChildDetails childViewModel=new ChildDetails();
  childViewModel.ParentID=id;
  childViewModel.Name=parent.Name;
  return View(childViewModel);
}

@model ChildDetails

<h2>@Model.ParentName</h2>
@using(Html.BeginForm())
{
  @Html.TextBoxFor(x=>x.Note)
  @Html.HiddenFor(x=>x.ParentId)
  <input type="submit" />
}

ViewBag.MyParam = "1";

ViewData("MyParam") = "1";

TempData("MyParam") = "1";