Secure ASP.NET Web API using API Key Authentication – HMAC Authentication http://bitoftech.net/2014/12/15/secure-asp-net-web-api-using-api-key-authentication-hmac-authentication/
SQL Server : Index at a glance http://www.practicalsqldba.com/search/label/Index
Performance Considerations for Entity Framework 4, 5, and 6 https://msdn.microsoft.com/en-in/data/hh949853.aspx
原文：http://www.cnblogs.com/cdjboy/p/5358189.html