title: Grid In scrollviewer
body: <ul>
  <li>i used a GroupBox with a scrollviewer inside it ..and inside scrollviewer i put a grid and begin to put my controls (3 textblocks and 6 textboxes)
  -after making my scrollviewer to scroll my content (the remaining 3 textboxes) i faced a trouble of grid inside scrollviewer appear behind things like the next pic</li>
  <li>how can i make grid have the same size of GroupBox and doesn't appear behind controls??
  <img src="https://i.stack.imgur.com/NpNch.png" alt="enter image description here"></li>
  </ul>