小编Joh*_*ter的帖子

我一直致力于将 ASP.NET 5 RC1 应用程序升级到 ASP.NET Core 1。我通过替换包（AspNet 到 AspNetCore）并从 EF7 更改为 EF Core（Microsoft.Data.Entity 到 Microsoft. EntityFrameworkCore）。

我遇到的问题是连接超时过期的间歇性 SqlException。

这是完整的例外：

System.Data.SqlClient.SqlException occurred.  
Class=11 ErrorCode=-2146232060 HResult=-2146232060 LineNumber=0  
**Message=Connection Timeout Expired.  The timeout period elapsed while attempting to consume the pre-login handshake acknowledgement.  This could be because the pre-login handshake failed or the server was unable to respond back in time.  The duration spent while attempting to connect to this server was - [Pre-Login] initialization=924; handshake=6;**   
  Number=-2   
  Procedure=""  
  Server=(localdb)\mssqllocaldb  
  Source=.Net SqlClient Data …