Hey I was wondering if someone could help me with this problem, as I
have been working on it for the course of the whole morning. Its
probably something really simple but I just can't figure it out.
So, I made a UserControl with XAML. Which is right here...

Grid size inside UserControl
hokietoner
VerticalContentAlignment
="Stretch"HorizontalContentAlignment="Stretch"
Note the extra "Content" part of it. If you don't it will not scale correctly. Skip the HorizontalAlignment bits inside the control.
J Tatta
Aarom
Yes, as Malmer has said, you can set the content alignment:
<UserControl x:Class="TestUserControl.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Background="Blue"
VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
Ross Watson
Thundermaker
Try adding HorizontalAlignment and VerticalAlignment to the UserControl definition tag itself. The grid is going to size to the UserControl, and it is currently going to size to its content, not to the enclosing element.
I have not tried this myself, so this is only a suggestion.
rod 001
ChocolateBoyWonder
Thank you for all the respones.