Hello after I migrate my system, the framework 2.0 to 4.5.1 , I found some problems, I am solving... , However I have a problem I am unable to solve , I sought for a long time and did not get a solution.....
I Use Visual Studio 2013
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)
System.Web.UI.ControlCollection.Add(Control child) +9718890
AjaxControlToolkit.ToolkitResourceManager.RegisterCssReferences(Control control) +861
AjaxControlToolkit.ExtenderControlBase.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +59
System.Web.UI.Control.LoadRecursive() +131
System.Web.UI.Control.LoadRecursive() +131
System.Web.UI.Control.LoadRecursive() +131
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +780
Some of the que solutions did not work .: The Controls collection cannot be modified because the control contains code blocks
Thanks all!