<UserControl x:Class="_015_Size.MainPage"
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"
mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">
<StackPanel Margin="3">
<Button Margin="10" MaxWidth="400" MinWidth="200" Content="Botão"></Button>
<Button Margin="10" MaxWidth="400" MinWidth="200" Content="Outro botão"></Button>
<Button Margin="10" MaxWidth="400" MinWidth="200" Content="Mais um"></Button>
<Button Margin="10" MaxWidth="400" MinWidth="200" Content="E outro"></Button>
</StackPanel>
</UserControl>