i will fixed this problem, But does it harm other places? dont have any idea.
in LayoutExtenions.cs NopTitle Method's return old vay = MvcHtmlString.Create(html.Encode(pageHeadBuilder.GenerateMetaDescription()));
return new vay=
MvcHtmlString.Create(html.Raw(pageHeadBuilder.GenerateMetaDescription()).ToHtmlString()); or MvcHtmlString.Create(html.Raw(pageHeadBuilder.GenerateMetaDescription()).ToString());