Exception during XamlReader.Load (..)

Question

I get an exception during (UIElement) XamlReader.Load (...) which says

'Cannot create unknown type 'TextBox'.' Line number '1' and line position '2'. 

on the following xaml:

 <TextBox Name="inputMyFirstString" BorderThickness="0" HorizontalAlignment="Stretch" Text="test"></TextBox> 

What did I misunderstand?

Answer 1

I think this is due to the missing namespace . Try

 <TextBox xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" ... 

Answer 2

I know this is an old question, but I think the “correct” answer is still missing. You can avoid changing the XAML by adding the required namespaces to the code:

 ParserContext context = new ParserContext(); context.XmlnsDictionary.Add("","http://schemas.microsoft.com/winfx/2006/xaml/presentation"); context.XmlnsDictionary.Add("x", "http://schemas.microsoft.com/winfx/2006/xaml"); //etc. object content = XamlReader.Load(stream, context); 

Answer 3

Add the xmlns attribute to the Window element in your XAML:

 <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" ...