how to bind width of child element to width of parent element in silverlight

Question

I have a grid whose width is \"1*\". So the actual width decided at runtime I think. Within that grid I have another grid whose width I want to set to the runtime width of paren

Answer 1

I think that easiest way to do same thing is:

HorizontalAlignment="Stretch"

That is not using binding as you have been asked, but it is easier.