The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name

可以強迫部署EntityFramework.SqlServer.dll這個文件到輸出目錄

 

找到1個老外的帖子，戳這里（本人測試無效，大家有可能試一下。。）

解決方案以下：

在EF的上下文代碼CS文件（Model1.Context.cs）中添加這個方法

 

public void FixEfProviderServicesProblem() { //The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' //for the 'System.Data.SqlClient' ADO.NET provider could not be loaded. //Make sure the provider assembly is available to the running application. //See http://go.microsoft.com/fwlink/?LinkId=260882 for more information. var instance = System.Data.Entity.SqlServer.SqlProviderServices.Instance; }