Understanding the data-binding syntax

As we mentioned before, the default data-binding type in UWP is One-Way, so we need to set a specific value as TwoWay:
<TextBox Text="{Binding UserName, Mode=TwoWay}"></TextBox>
Now you can get an app shown below:
In the next section, I will add some real API Services to get some data from the online APIs and add some commands.