wpf application is showing error when resource is applied

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sir ! i have developed a simple wpf application using static resources in textblocks and stackpanel .
here's code of window1.xaml:
<window x:class="Resource_tutor.Window1" xmlns:x="#unknown">
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
Title="Resource Demo" Height="300" Width="300" removed="Lime">
<window.resources>
<sys:string x:key="strHelloworld" xmlns:sys="#unknown">Hello,world!

<stackpanel margin="10" removed="Lavender">
<textblock text="{staticResource strHelloworld}" fontsize="56">
<textblock>just another "<textblock text="{staticResource strHelloworld}">" example but with resources

--------------------------------------------------------------------
it is showing error:
''xmlns' is a duplicate attribute name. XML is not valid. C

Posted 12-Aug-14 4:27am

tusharkaushik

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[no name] 12-Aug-14 10:29am

So remove the duplicate entry.

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Jason Gleim · Accepted Answer · 2014-08-12T04:57:00

You have:

VB

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

The second

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

is a duplicate of the first. You can only have ONE root XML namespace which is the "xmlns" without any postfix. The offending line duplicates the next one which has the proper postfix (notice the :x)

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"