1. Suppose we have 5 different windows in our hand.(a,b,c,d,e). Can we get/access a window object from a different window(e.g. b wants to get the window object e) 2. We can pass value from child to it's parent. But is it possible to pass value from parent to a already opened child ?

Placing an "@" does not produce any error for line break. e.g. the following code would produce an error. string x = "Blah blah blah" + Convert.Tochar(37) .ToString(); But the following would not string x = @"Blah blah blah" + Convert.Tochar(37) .ToString(); (I am writing this without testing. So feel free to let me know if I am wrong.)