近年来这方面的研究开发主要是围绕结构 、 合成 、 表征和催化反应等方面开展的. So your DataContext for "video_length_textbox" is set to itself, along with your IncrementingTextBox class does not have a public property referred to as ConfigurationModel Lazy Initialization: If you have a property of the item that is pricey to load, but isn't really accessed all that https://orrisaanandamora.blogspot.com