How to access a style inside user control in UWP - xaml

Question

I have a user control like this:
<UserControl>
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<HyperlinkButton Grid.Row="0" />
<TextBlock Name="textblock" Grid.Row="1"
Text="{Binding dailyText, ElementName=userControl}">
</TextBlock>
</Grid>
</UserControl>
Nevertheless, I don't know, how can I set a style from mainwindow to user control? I have solved the problem to access to other properties like this:
public static readonly DependencyProperty MyContentProperty =
DependencyProperty.Register("MyContent", typeof(object), typeof(Day), null);
public object MyContent
{
get { return (object)GetValue(MyContentProperty ); }
set { SetValue(MyContentProperty , value); }
}
And then
<local:Day MyContent="Hello World" />
However, it doesn't work the style. There is no change in the sytle.
Thank you.
(Modification)
Below is a mainWindow part.
<Page.Resources>
<Style TargetType="TextBlock" x:Name="MyTextBlockStyle">
<Setter Property="Foreground" Value="Blue" />
<Setter Property="SelectionHighlightColor" Value="Red"/>
<Setter Property="FontSize" Value="10"/>
</Style>
</Page.Resources>
<local:Day MyStyle="{StaticResource MyTextBlockStyle}">
Behind-code part in userControl
public static readonly DependencyProperty MyStyleProperty =
DependencyProperty.Register("MyStyle", typeof(Style), typeof(Day), null);
public Style MyStyle
{
get { return (Style)GetValue(MyStyleProperty); }
set { SetValue(MyStyleProperty, value); }
}

Answer 1

You can use PropertyMetadata to initialise and set Style to your TextBlock. Like,
public Style MyStyle
{
get { return (Style)GetValue(MyStyleProperty); }
set { SetValue(MyStyleProperty, value); }
}
public static readonly DependencyProperty MyStyleProperty =
DependencyProperty.Register("MyStyle", typeof(Style), typeof(Day),
new PropertyMetadata(null, OnStyleChange));
private static void OnStyleChange(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var control = d as Day;
control.textblock.Style = (Style)e.NewValue
}