Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/class/System.Web.Mvc3/Mvc/Html/PartialExtensions.cs

@@ -0,0 +1,25 @@
+namespace System.Web.Mvc.Html {
+    using System.Globalization;
+    using System.IO;
+
+    public static class PartialExtensions {
+        public static MvcHtmlString Partial(this HtmlHelper htmlHelper, string partialViewName) {
+            return Partial(htmlHelper, partialViewName, null /* model */, htmlHelper.ViewData);
+        }
+
+        public static MvcHtmlString Partial(this HtmlHelper htmlHelper, string partialViewName, ViewDataDictionary viewData) {
+            return Partial(htmlHelper, partialViewName, null /* model */, viewData);
+        }
+
+        public static MvcHtmlString Partial(this HtmlHelper htmlHelper, string partialViewName, object model) {
+            return Partial(htmlHelper, partialViewName, model, htmlHelper.ViewData);
+        }
+
+        public static MvcHtmlString Partial(this HtmlHelper htmlHelper, string partialViewName, object model, ViewDataDictionary viewData) {
+            using (StringWriter writer = new StringWriter(CultureInfo.CurrentCulture)) {
+                htmlHelper.RenderPartialInternal(partialViewName, viewData, model, writer, ViewEngines.Engines);
+                return MvcHtmlString.Create(writer.ToString());
+            }
+        }
+    }
+}