I attempted to make a simple calculator app to start learning about WPF.
The issue that I am currently facing is that when I resize (Maximize, Minimize) the window the layout of my calculator app will change in a bad way. I cannot tell if it is the font of each button that is causing this issue or the overall layout of my XAML.
Here is the XAML:
<Window x:Class="Calculator.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Calculator"
mc:Ignorable="d"
Title="Calculator" Height="600" Width="500"
WindowStartupLocation="CenterScreen">
<!-- Container -->
<Grid Margin="10"
Style="{StaticResource Root}"
>
<Grid.ColumnDefinitions>
<ColumnDefinition
Width="*"
/>
<ColumnDefinition
Width="30*"
/>
<ColumnDefinition
Width="*"
/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition
Height="*"
/>
<RowDefinition
Height="16*"
/>
<RowDefinition
Height="32*"
/>
<RowDefinition
Height="*"
/>
</Grid.RowDefinitions>
<!-- Display -->
<Border
Grid.Column="1"
Grid.Row="1"
Style="{StaticResource Display}"
>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition
Width="*"
/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition
Height="*"
/>
<RowDefinition
Height="2*"
/>
</Grid.RowDefinitions>
<Label
x:Name="Label_DisplayNumber"
Content="0"
HorizontalAlignment="Right"
VerticalAlignment="Center"
Grid.Column="0"
Grid.Row="1"
FontSize="75"
Foreground="#183B5D"
Margin="0, 0, 20, 0"
/>
<Label
x:Name="Label_DisplayOperation"
Content=""
HorizontalAlignment="left"
VerticalAlignment="Center"
Grid.Column="0"
Grid.Row="0"
FontSize="40"
Foreground="#183B5D"
Margin="20, 0, 0, 0"
/>
</Grid>
</Border>
<!-- Controls -->
<Grid
Grid.Column="1"
Grid.Row="2"
Style="{StaticResource Interface}"
>
<Grid.ColumnDefinitions>
<ColumnDefinition
Width="*"
/>
<ColumnDefinition
Width="*"
/>
<ColumnDefinition
Width="*"
/>
<ColumnDefinition
Width="*"
/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition
Height="*"
/>
<RowDefinition
Height="*"
/>
<RowDefinition
Height="*"
/>
<RowDefinition
Height="*"
/>
<RowDefinition
Height="*"
/>
</Grid.RowDefinitions>
<!-- Buttons_Numbers -->
<Button
Content="0"
Grid.Column="0"
Grid.ColumnSpan="2"
Grid.Row="4"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="1"
Grid.Column="0"
Grid.Row="3"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="2"
Grid.Column="1"
Grid.Row="3"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="3"
Grid.Column="2"
Grid.Row="3"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="4"
Grid.Column="0"
Grid.Row="2"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="5"
Grid.Column="1"
Grid.Row="2"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="6"
Grid.Column="2"
Grid.Row="2"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="7"
Grid.Column="0"
Grid.Row="1"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="8"
Grid.Column="1"
Grid.Row="1"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<Button
Content="9"
Grid.Column="2"
Grid.Row="1"
Style="{StaticResource Button_Number}"
Click="Button_Click_Number"
/>
<!-- Buttons_Operators -->
<Button
Content="AC"
Grid.Column="0"
Grid.ColumnSpan="2"
Grid.Row="0"
Style="{StaticResource Button_Operator}"
Click="Button_Click_AllClear"
/>
<Button
Content="+/-"
Grid.Column="2"
Grid.Row="0"
Style="{StaticResource Button_Operator}"
Click="Button_Click_SignConversion"
/>
<Button
Content="/"
Grid.Column="3"
Grid.Row="0"
Style="{StaticResource Button_Operator}"
Click="Button_Click_Operator"
/>
<Button
Content="*"
Grid.Column="3"
Grid.Row="1"
Style="{StaticResource Button_Operator}"
Click="Button_Click_Operator"
/>
<Button
Content="-"
FontStretch="UltraExpanded"
Grid.Column="3"
Grid.Row="2"
Style="{StaticResource Button_Operator}"
Click="Button_Click_Operator"
/>
<Button
Content="+"
Grid.Column="3"
Grid.Row="3"
Style="{StaticResource Button_Operator}"
Click="Button_Click_Operator"
/>
<Button
Content="="
Grid.Column="3"
Grid.Row="4"
Style="{StaticResource Button_Operator}"
Click="Button_Click_Equal"
/>
<Button
Content="."
Grid.Column="2"
Grid.Row="4"
Style="{StaticResource Button_Operator}"
Click="Button_Click_Period"
/>
</Grid>
</Grid>
Here is how the calculator app looks in normal size:

Here is how the calculator app looks when the window is maximized:

I am not exactly sure what is causing it to look so bad when the window is maximized. It seems to me that my buttons are stretching way too much which makes them look wide and the font inside very small. So here are my questions:
How can I improve the layout to make it better?
Does the "Button" element contain a property that allows the font inside it to stretch so that it won't look so small on maximized windows?