visual studio - 擴展方法上的奇怪錯誤

Error 1335 The call is ambiguous between the following methods or properties: 
'Wedding.Helpers.ModelStateExtensions.GetFirstErrorMessage(System.Web.Mvc.ModelStateDictionary)' and 
'Wedding.Helpers.ModelStateExtensions.GetFirstErrorMessage(System.Web.Mvc.ModelStateDictionary)'  
C:\Documents and Settings\Administrator\scratch\Archant\WebSites\Weding\Areas\AddressBook\Controllers\Partner\HomeController.cs 
31 69 Wedding

它指向衝突上完全相同的方法！visual studio - 擴展方法上的奇怪錯誤

爲什麼哦爲什麼？！

來源

2011-11-17 iwayneo

http://stackoverflow.com/questions/1282636/the-call-is-ambiguous-between-the-following-methods-or-properties-bug/1282640＃1282640 –

我沒有一個App_Code文件夾:( – iwayneo

可能是你自己的項目引用！ –