摘要：
Debug Data Bindings Using an IValueConverterProblemYou need to debug a binding that is not working as expected and want to make sure the correct values are going in.SolutionCreate a converter class that implements System.Windows.Data.IValueConverter and returns the value it receives for conversion, 阅读全文
摘要：
一. Three main elements in UML1. basic build block: thing, relationship, diagram2. rule: name, scope, visibility, integrity, execution3. common mechanism: specification, adornment, common division, extensiblity mechanism(stereotype, tag value, constraint)二. Relationship: dependency, association, gene 阅读全文
摘要：
开闭原则(open/close principle, OCP): Open on extensibility , close on modification. We should use interface to encapsulation, use abstract mechanism, and use polymorphism.Liskov替换原则(Liskov Substitution Principle, LSP), 依赖倒置原则(Dependency Inversion Principle, DIP) depend on interface, instead of concrete 阅读全文