I've started getting an error when trying to run an asp.net page with a WebScriptManager on the page. The exception detail is:
System.Reflection.CustomAttributeFormatException: 'fl' property specified was not found.
The debugger in Visual Studio always points to the WebScriptManager as the problem and when I remove the WebScriptManager the problem disappears - but then I can't add the WebDataGrid to the page.
I'm using Visual Studio 10 with Infragistics NetAdvantage ASP.NET 11.1 and CLR4.
All of my projects which use the WebScriptManager have stopped working with the same error. I must have done something to cause this but I haven't found it after a day of searching.
Any help would be appreciated.
Thanks, Terry