在p ublic List< string>中MyComboBoxData setter，base.OnPropertyChanged的参数应该是属性的确切名称 - MyComboBoxData - 大写字母M且没有空格。

In the public List<string> MyComboBoxData setter, the argument of base.OnPropertyChanged should be exact name of the property - "MyComboBoxData" - capital M and no space.