How placing controls in a WrapPanel differs from a Grid?

Placing controls inside a WrapPanel will shrink the control to it’s minimum width or it will wrap the controls to the next line when the form’s size is reduced. But when the form’s size is increased it will not resize the control accordingly, instead, it will place the controls next to each other. On the other hand, if the controls are placed inside a Grid, it will resize the controls when the form is resized.