Changed .Net Framework from 4.5 to 3.5, the Settings file now throws a ConfigurationErrorException -


i created windows program using .net framework 4.5. realized wouldn't able deploy windows xp machines, changed framework 3.5. i've fixed several problems, i'm struggling one. re-created settings file. i'm getting error an error occurred creating configuration section handler usersettings/rallycoursedesigner.properties.settings: not load file or assembly 'system, version=3.5.0.0, culture=neutral, publickeytoken=b77a5c561934e089' or 1 of dependencies. system cannot find file specified. time reference item in settings. it's not clear me start. thoughts? thanks!


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