How can I convert this XAML code into C# code?

Question

How can I convert this XAML code into C# code?

<Window.Resources>
    <DataTemplate x:Key="itemtemplate">
        <TextBlock Text="{Binding Path=Text}"/>
    </DataTemplate>
</Window.Resources> 

Answer 1

Try the following. Not an imperative WPF expert so you may need to alter this slightly

public void Example()
{
    var factory = new FrameworkElementFactory(typeof(TextBlock));
    factory.SetBinding(TextBlock.TextProperty, new Binding("Text"));

    var dataTemplate = new DataTemplate();
    dataTemplate.VisualTree = factory;
    dataTemplate.Seal();
}

Answer 2

The correct way to create DataTemplates from C# is to use a XamlReader and give it what you wrote in your question.

Which is unpleasant, to say the least. Sorry.