title: Prevent Save when Validation Errors occur on WPF DataGrid
body: <p>Currently, I have a DataGrid which is bound to some data in my ViewModel. I have ValidationRules set up for the Rows, and the Columns. What I would like to do is prevent the user from saving the file if there are any Validation Errors. I am using the RelayCommands class to route the Open, Save, etc commands to my ViewModel. </p>