Why can't I comment attributes in XAML?

Question

This has been bothering me for a while, maybe I am missing something.

The following throws an error with the commented attribute (expected >), but shouldn't I be able to do something like this?

<Label x:Name="Gaga"                FontSize="20"                <!--                Content="{Binding SomethingThatIsEmptyAtDesignTime"}                 -->                Content="LookAtMe!"                /> 

Answer 1

Though you can't comment out using the basic XAML markup, you can achieve the desired results by importing the Open XML markup namespace.

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:ignore="http://www.galasoft.ch/ignore" mc:Ignorable="ignore"  <Label x:Name="Gaga"        FontSize="20"        ignore:Content="{Binding SomethingThatIsEmptyAtDesignTime}"        Content="LookAtMe!" /> 

This blog post describes how to do it.