Question

For example

a = datacontext.customers.FirstOrDefaul();
b = datacontext.customers.Skip(1).FirstOrDefaul();

a.name="name1";
b.Name="name2";

When i call datacontext.SubmitChanges(), Two object updated. I don’t want this.

I need only Update a object. How do it?

EDIT

WPFWindow windowA=new WPFWINDOW()
windowA.DataContext=a;
windowA.Show();

WPFWindow windowB=new WPFWINDOW()
windowB.DataContext=b;
windowB.Show();

When clicking save button from window, corresponding object saving.
When clicking cancel button, corresponding object not saved

Answer 1

You need to use separate DataContext’s.