异常详细：
An exception of type 'System.Data.Entity.Core.EntityException' occurred in EntityFramework.SqlServer.dll but was not handled in user codeAn exception of type 'System.Data.Entity.C
阅读背景：
EntityFrame6在本地可以正常使用，部署到IIS后报异常（Additional information: The underlying provider failed on Open.）
来源：互联网
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