title: C# WPF multiple windows
body: <p>probably a beginner question,</p>
  
  <p>I develop in c # wpf a graphical application with different windows, if I now open a new window with button and there, for example, capture a customer, then how can the other window still remain interactible with the open table?</p>
  
  <p>or how can I run a function in another window that is supposed to update a DataGrid of another window (other .xaml file)?</p>