在分离数据库DatabaseName(暂且用DatabaseName代替该数据库名)后,我将其数据文件以及日志文件移动到新增的磁盘上.然后附加该数据库,结果报如下错误: Database 'DatabaseName' cannot be upgraded because it is read-only or has read-only files. Make the database or files writeable, and rerun recovery. Could not open…
一. static 多对象共享一段空间,或者说没有对象概念,就是类的概念,不需要实例化,自动被创建.多用于长期共享.不会为对象的创建或销毁而消失. public class C { ) public A Ci { get { return a; } } public C(A b) { a = b; Console.WriteLine("构造" + a.Presentation); } //public static void Set() //{ // a = new A("…