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摘要： Light中定义了类GalaSoft.MvvmLight.Command.RelayCommand这个类继承了ICommand方法，实现了其中的方法，Action就是一个方法参数// 摘要: // A command whose sole purpose is to relay its functionality to other objects // by invoking delegates. The default return value for the CanExecute method // is 'true'. This class... 阅读全文