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An error occurred during the compilation of the requested file, or one of its dependencies. 'ASP._controltemplates_tandan_dvc_portalwebpart_portaldvcthongkedonvidangbang_portaldvcthongkedonvidangbangusercontrol_ascx' does not contain a definition for 'TimerTick' and no extension method 'TimerTick' accepting a first argument of type 'ASP._controltemplates_tandan_dvc_portalwebpart_portaldvcthongkedonvidangbang_portaldvcthongkedonvidangbangusercontrol_ascx' could be found (are you missing a using directive or an assembly reference?)

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