I got a following error in my asp.net application "The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)."
please help me to fix this issue,
Masterpage:
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="mastermain.master.cs" Inherits="Common_mastermain" %> <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <asp:ContentPlaceHolder ID=& ...

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