</TextBox>
</source>
Pay attention to which [https://learn.microsoft.com/en-us/uwp/api/windows.ui.xaml.controls.textbox?view=winrt-26100#events Event] is used to trigger the StoreProfileParameterCommand. The above example uses LostFocus, which fires when the user clicks out of the TextBox. Another possible choice is TextChanged, however, this means that the command will fire with every keystroke, which may reduce overall performance.
</tab>
</Entry>
</source>
The Xamarin 'Completed' event fires when the user clicks the return button on their onscreen keyboard.
</tab>
{{Hint|StringFormatConverter/StringFormat is used to format the key-value pair as required by the StoreProfileParameterCommand. The key is hardcoded into the formatted string as, for example <noWiki>'name={0}'</noWiki>. The dynamic value, in this case whatever is inputted in the text field when the edit is completed, replaces the <noWiki>{0}</noWiki> tag when the binding is evaluated (ie. when the command is executed).}}