摘要： 数据库管理软件是MS SQL，数据库是微软的NorthWind。主体代码,完整的解决方案见最下方 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace TestCodeFirst 7 { 8 class Program 9 {10 static void Main(string[] args)11 {12 ValidaProduct();13 ... 阅读全文

摘要： System.InvalidOperationException: The type MyContext+Northwind was not mapped. Check that the type has not been explicitly excluded by using the Ignore method or NotMappedAttribute data annotation. Verify that the type was defined as a class, is not primitive, nested or generic, and does not inherit 阅读全文