XAML Databound TextBlock showing unknown character glyph - xaml

Question

Question: Why won't my databound text render as text
When I am using databound TextBlock controls, the output in my Windows App shows as Squares, like it can't figure out what to render the text as. If I put actual text in the Text property, it displays normally.
<RelativePanel x:Name="BasicInfo" RightOf="ProfilePicture">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal">
<TextBlock x:Name="FirstName" Text="{Binding FirstName}"
TextWrapping="NoWrap" Margin="10,0,0,0"/>
<TextBlock x:Name="LastName" Text="{Binding LastName}"
TextWrapping="NoWrap" Padding="3,0,0,0"/>
</StackPanel>
<TextBlock x:Name="EmailAddress" HorizontalAlignment="Left" Text="{Binding EmailAddress}"
TextWrapping="NoWrap" Margin="10,2,0,0" />
<TextBlock x:Name="PhoneNumber" HorizontalAlignment="Left" Text="{Binding PhoneNumber}"
TextWrapping="NoWrap" Margin="10,2,0,0" />
</StackPanel>
</RelativePanel>
<RelativePanel x:Name="AddressInfo" Below="BasicInfo" RightOf="ProfilePicture" Margin="0, 20, 0, 0">
<StackPanel Orientation="Vertical">
<TextBlock x:Name="Address1" HorizontalAlignment="Left" Text="{Binding Address1}"
TextWrapping="NoWrap" Margin="10,0,0,0"/>
<TextBlock x:Name="Address2" HorizontalAlignment="Left" Text="{Binding Address2}"
TextWrapping="NoWrap" TextAlignment="Left" Margin="10,0,0,0"/>
<StackPanel Orientation="Horizontal">
<TextBlock x:Name="City" HorizontalAlignment="Left" Text="{Binding City}"
TextWrapping="NoWrap" Margin="10,0,0,0"/>
<TextBlock>,</TextBlock>
<TextBlock x:Name="State" Text="{Binding State}"
TextWrapping="NoWrap" Margin="3,0,0,0"/>
</StackPanel>
<TextBlock x:Name="ZipCode" HorizontalAlignment="Left" Text="{Binding ZipCode}"
TextWrapping="NoWrap" Margin="10,0,0,0"/>
</StackPanel>
</RelativePanel>
Here is what the output looks like:

Answer 1

we can try in xaml.cs page
Dispatcher.BeginInvoke(delegate
{
listboxname.ItemsSource = Resultclassname;
});