asp.net - The type 'System.Web.UI.ScriptManager' is ambiguous: it could come from assembly -

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when run asp.net app error

the type ‘system.web.ui.scriptmanager’ ambiguous:

i having same problem person having http://forums.asp.net/t/1313257.aspx , when change 1.0.61025.0 3.5 , re-compile resets 1.0.61025.0

what can resolve this. i've been trying app running hours now.

thanks

edit ~ helpppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp

i see 2 system.web.extensions in gac. tried remove gacutil.exe /u system.web.ext ensions, version=1.0.61025.0, culture=neutral, publickeytoken=31bf3856ad364e35 microsoft (r) .net global assembly cache utility. version 2.0.50727.42 copyright (c) microsoft corporation. rights reserved.

unknown option: version=1.0.61025.0 doing wrong.

edit ~ solution

i went "add remove programs" , un-installed ajax web extensions 2.0 version 1.0.61025.0

it looks (perhaps indirectly) referencing old system.web.extensions dll. check config file , search application "system.web.extensions". make sure old version not in bin folder (and not copied there).

make sure not using other libraries use old system.web.extensions dll, ie ajax toolit 1.0.x.


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