Hardcode String in Xml in Silverlight

[nixen09]

i am new to xml in silverlight.i have one small xml file below

<FlowActivities>

<SequenceFlow >

<FlowWriteLine>

hiiii

</FlowWriteLine>

</SequenceFlow>

</FlowActivities>

in this i want to hardcode some namespace in rootnode.like

<FlowActivities x:Class="WorkflowConsoleApplication1.modify"
xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities"
mc:Ignorable="sap2010"
xmlns:mc="http://schemas.openxmlformats.org/markup- compatibility/2006"
sap2010:ExpressionActivityEditor.ExpressionActivityEditor="C#"
xmlns:sap2010="http://schemas.microsoft.com/netfx/2010/xaml/activities/presentation"
xmlns:sco="clr-namespace:System.Collections.ObjectModel;assembly=mscorlib"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

<SequenceFlow >

<FlowWriteLine>

hiiii

</FlowWriteLine>

</SequenceFlow>

</FlowActivities>

for getting this wht i have to do..? pls sort this out..?