title: Double binding on a WPF DataGrid?
body: <p>I am new to mvvm and I am not really familiar with the control DataGrid. I would like to known if we can do multiple binding on a DataGrid or anything.</p>
  
  <p>Let me explain, I have 3 TextBox ( ProductName, Quantity, Price ) and i have 4 colums in my dataGrid ( ProductName, Quantity, Price, Total(price*quantity)). I also have 2 bouton, (add product) which will add the textBox value to the DataGrid and a bouton (save) which will save the content of the dataGrid in a DataBase.</p>
  
  <p>How should I proceed ?</p>