<connectionStrings> <add name="ConnectionStringName" providerName="System.Data.SqlClient" connectionString="Data Source=.;Initial Catalog=DataBaseName;Integrated Security=True;Pooling=False" /> </connectionStrings>
必须写在
<configSections> <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --> <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.3.1.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> </configSections>
之后
“System.Data.Entity.Internal.AppConfig"的类型初始值设定项引发异常。{转}
原文：http://www.cnblogs.com/answercard/p/4623432.html