Binding two text boxes residing in two different pages/window in WPF

I have text box in debit voucher page.In this page i have a text box name particulars.Ihave also a page creadit voucher where there is a text box name particulars.Now i want to bind both these text boxes , so that when ever i type some thing in any text box which will copied to another

its simple, you can easily bind properties anywhere in the class, the moment you bind public properties then UI thread will do its job.

You mean to bind the same value or different value? Explain a little bit more. Thanks