Pass value from one window to another in WPF

Hi I need a way around to pass value from one form to another in wpf C# application. Basically form1 has a button1 and a textbox1 when user clicks on button1 form 2 shows up as a dialog. form2 has a textbox and button1. So when the user presses button1 in form2 the textbox in form2 gets a value "hello world" and then form2 should close and form1's textbox1 should show the value that was entered in the form2's textbox. I have used the public event and raise event in vb.net but not so sure how to do it in C#. thanks ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform winxp