Recently, I realized that MVVM pattern is so useful for Silverlight application and studying how to adopt it into my project.
BTW, how to hook up the textbox\'s text
Here's the MvvmLight way of doing it! Credit goes to GalaSoft Laurent Bugnion.
Source: http://blog.galasoft.ch/archive/2010/05/19/handling-datagrid.selecteditems-in-an-mvvm-friendly-manner.aspx