I am writing a sudoku application in WPF and I am using a 4x4 UniformGrid which has four smaller 2x2 UniformGrids inside of it. Every grid cell contains a textbox in which the number will be inputted. I need to make the outside of all borders thicker. For example, I would like to set the outside border thickness of the main grid to 3.
I need to create the style in App.xaml file and then use it on the UniformGrid components. I have already tried with a Rectangle, but I cannot make it work. So any hints are appreciated.
Here is the code I used to create the grid.
<Grid>
<UniformGrid Name="mainGrid">
<UniformGrid Name="grid1">
<TextBox Name="tb0"/>
<TextBox Name="tb1"/>
<TextBox Name="tb2"/>
<TextBox Name="tb3"/>
</UniformGrid>
<UniformGrid Name="grid2">
<TextBox Name="tb4"/>
<TextBox Name="tb5"/>
<TextBox Name="tb6"/>
<TextBox Name="tb7"/>
</UniformGrid>
<UniformGrid Name="grid3">
<TextBox Name="tb8"/>
<TextBox Name="tb9"/>
<TextBox Name="tb10"/>
<TextBox Name="tb11"/>
</UniformGrid>
<UniformGrid Name="grid4">
<TextBox Name="tb12"/>
<TextBox Name="tb13"/>
<TextBox Name="tb14"/>
<TextBox Name="tb15"/>
</UniformGrid>
</UniformGrid>
</Grid>