The Controls collection cannot be modified because the control contains code blocks (i.e. ).

Inner Exception:  The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
Stack Trace:  at System.Web.UI.ControlCollection.AddAt(Int32 index, Control child) at Telerik.Web.UI.RadAjaxControl.MoveUpdatePanel(Control initiator, Control updated) at Telerik.Web.UI.RadAjaxControl.PerformRender() at Telerik.Web.UI.RadAjaxControl.OnPageRender(HtmlTextWriter writer, Control page) at Telerik.Web.UI.RadAjaxControl.RenderPageInAjaxMode(HtmlTextWriter writer, Control page) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Page.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<MvcApplication43.Tbl_Raw_Material_Batch>" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<script runat="server">

 /*   protected void Page_Load(object sender, EventArgs e)
    {

        RadGrid1.DataSource = ViewData["List"];
        RadGrid1.DataBind();

    }*/



</script>

<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
    test5





</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<h2>test5</h2>

    <form id="form1" runat="server">



    <telerik:RadGrid ID="RadGrid1" runat="server">
    </telerik:RadGrid>

    <telerik:RadScriptManager ID="ScriptManager1" runat="server">
<Scripts>
<asp:ScriptReference Name="Telerik.Web.UI.Common.Core.js" Assembly="Telerik.Web.UI" />


</Scripts>

</telerik:RadScriptManager>
    </form>


</asp:Content>

<asp:Content ID="Content3" ContentPlaceHolderID="FeaturedContent" runat="server">
</asp:Content>

<asp:Content ID="Content4" ContentPlaceHolderID="ScriptsSection" runat="server">
</asp:Content>