Output full request, just in case

AngleSharp.TestSite/Controllers/EchoController.cs

@@ -1,6 +1,7 @@
 namespace AngleSharpSubmitTest.Controllers
 {
     using AngleSharpSubmitTest.Models;
+    using System.IO;
     using System.Web.Mvc;
 
     public class EchoController : Controller
@@ -11,6 +12,7 @@
         {
             var form = Request.Form;
             var count = form.Count;
+            var reader = new StreamReader(Request.InputStream);
             var fields = new FormEntryModel[count];
 
             for (int i = 0; i < count; i++)
@@ -24,7 +26,8 @@
 
             return View(new FormModel
             {
-                Fields = fields
+                Fields = fields,
+                Content = reader.ReadToEnd()
             });
         }
     }

AngleSharp.TestSite/Models/FormModel.cs

@@ -6,6 +6,8 @@
     public class FormModel
     {
         public IEnumerable<FormEntryModel> Fields { get; set; }
+
+        public String Content { get; set; }
     }
 
     public class FormEntryModel

AngleSharp.TestSite/Views/Echo/Index.cshtml

@@ -13,3 +13,7 @@
         </tr>
     }
 </table>
+
+<div id="input">
+@Model.Content
+</div>