Xamarin Form How to Use Special Character on Xaml Page.

The following table shows the syntax for encoding this set of special characters:

HOW TO: USE SPECIAL CHARACTERS IN XAML

Character	Syntax	Description
<	&lt;	Less than symbol.
>	&gt;	Greater than sign.
&	&amp;	Ampersand symbol.
"	&quot;	Double quote symbol.

Example:

<Label FontAttributes="Bold" HorizontalTextAlignment="Start" VerticalTextAlignment="Center" HorizontalOptions="CenterAndExpand" Text="{Binding CurrentMonthYear}"   TextColor="White" FontSize="25" /

This will display < sign.

For more reference visit this link: https://docs.microsoft.com/en-in/dotnet/framework/wpf/advanced/how-to-use-special-characters-in-xaml