Hi All
Recently I hit a weird issue; I had a runtime error reported by Telerik control, The web site is compiled using .Net Framework 2.
Error Message
Message : Method not found: 'Boolean System.Web.UI.ScriptManager.get_LoadScriptsBeforeUI()'.
Source : Telerik.Web.UI
Apparently Script Manager implementation in such assembly is missing LoadScriptsBeforeUI
property implementation;
Steps Applied to resolve issus
I tried building the application to run over framework 3.5; it worked fine and such trial solved the issue however at some of my collegues pcs no such issue exists !!!!! oops I can't just ask my custmer to upgrade the entire production environment because it just didn't wok on my machine however I was definielty on the right path for getting answers.
I copied same bin and web configuration files from my collegues' machine and gave it a shot, same error no use; that's kind of fraustrating L
Observation
After uninstalling AjaxControlToolKit I noticed that my solution is referencing System.Web.Extensions from GAC while actual used Assembly was located in the web bin folder !! a rule of thumb .NETFrameWork will try loading Assemblies from GAC before ones located at Bin folder. It seems AjaxControlToolKit installs different implementation of ScriptManager and registers such new assembly in GAC holding same assembly name and version hence the web site solution never paid attension to assembly stored at the Bin folder
Steps to Resolve issue
· Uninstall AJAX toolkit
removes these assemblies from GAC
· Update solution by
removing undesired GAC assembly references (these are no longer valid
but VS doesn’t automatically detect that such assemblies are removed from GAC)
but VS doesn’t automatically detect that such assemblies are removed from GAC)
· Add new assembly references
for ones located in Bin directory
· Build the solution one more time
