Problem when create my button

Question

 when I create my button , my button is replace by this message "as the prefix name space "is not a URI namespace, the resolution of property" IsFocused "is not available. Error on line 48 position 37."
I don't understand ...

Answer 1

MrBean20000,

Are you able to post the XAML file or a small sample file that reproduces the error? 

Jonathan - MSFT

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Answer 2

 

<wpf:Window
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:wpf="http://schemas.microsoft.com/netfx/2007/xaml/presentation"
 x:Class="UntitledProject3.Window1"
 x:Name="Window"
 Title="Window1"
 Width="640" Height="480">

 <wpf:Window.Resources>
  <wpf:Style x:Key="ButtonStyle1" BasedOn="{x:Null}" TargetType="{x:Type wpf:Button}">
   <wpf:Setter Property="Template">
    <wpf:Setter.Value>
     <wpf:ControlTemplate TargetType="{x:Type wpf:Button}">
      <wpf:Grid>
       <wpf:Ellipse Fill="#FF980000" Stroke="#FF000000"/>
       <wpf:ContentPresenter SnapsToDevicePixels="{wpf:TemplateBinding SnapsToDevicePixels}" HorizontalAlignment="{wpf:TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{wpf:TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True"/>
      </wpf:Grid>
      <wpf:ControlTemplate.Triggers>
       <wpf:Trigger Property="IsFocused" Value="True"/>
       <wpf:Trigger Property="IsDefaulted" Value="True"/>
       <wpf:Trigger Property="IsMouseOver" Value="True"/>
       <wpf:Trigger Property="IsPressed" Value="True"/>
       <wpf:Trigger Property="IsEnabled" Value="False"/>
      </wpf:ControlTemplate.Triggers>
     </wpf:ControlTemplate>
    </wpf:Setter.Value>
   </wpf:Setter>
  </wpf:Style>
 </wpf:Window.Resources>
 <wpf:Button Style="{wpf:DynamicResource ButtonStyle1}"/>
</wpf:Window>