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Methodnotfound:'VoidSystem.Data.Objects.ObjectContextOptions.set_UseConsistentNullReferenceBehavior(Boolean)You can install EF5 for .NET4.0 via NuGet, but you probably won't get all the features.PM> Install-Package EntityFramework -Version 5.0.0 include ef 4.4使用 EF 4.4.0 <sectionname=& 阅读全文