I cant using Html.RenderAction in .cshtml - asp.net

Question

FRONTEND
#{
<div>
#Html.RenderAction("UrunOzellikTipWidget", "Admin");
#Html.RenderAction("UrunOzellikDegerWidget", "Admin");
</div>
}
BACKEND
public ActionResult UrunOzellikEkle()
{
return View(Context.Baglanti.Urun.ToList());
}
public PartialViewResult UrunOzellikTipWidged(int? katID)
{
if (katID != null)
{
var data = Context.Baglanti.OzellikTip
.Where(x => x.KategoriID == katID)
.ToList();
return PartialView(data);
}
else
{
var data = Context.Baglanti.OzellikTip.ToList();
return PartialView(data);
}
}
public PartialViewResult UrunOzellikDegerWidget(int? tipID)
{
if (tipID != null)
{
var data = Context.Baglanti.OzellikDeger
.Where(x => x.OzellikTipID == tipID)
.ToList();
return PartialView(data);
}
else
{
var data = Context.Baglanti.OzellikDeger
.ToList();
return PartialView(data);
}
}
**ERROR CODE:Severity Code Description Project File Line Suppression State Error CS0029 Cannot implicitly convert type 'void' to 'object'
**

Answer 1

#Html.RenderAction renders the result and, instead of returns it as string, writes it directly to the response and returns Void. So you will have to use it inside a C# block, denoted as #{ }, and end it with a semicolon at the end, just like how you invoke/call a void function.
So your front-end needs to be changed to:
<div>
#{
Html.RenderAction("UrunOzellikTipWidget", "Admin");
Html.RenderAction("UrunOzellikDegerWidget", "Admin");
}
</div>
The other's answer (removing the redundant ampersands) won't work because those 2 RenderAction are wrapped inside a <div />. If you remove the ampersand, they're treated as just regular HTML. It will output as:

Answer 2

Revise your code in FRONTEND to the following (remove the redundant ampersands from both Html.RenderAction statements).
<div>
#{ Html.RenderAction("UrunOzellikTipWidget", "Admin"); }
#{ Html.RenderAction("UrunOzellikDegerWidget", "Admin") };
</div>