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    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="20" />
            <ColumnDefinition Width="auto" />
            <ColumnDefinition Width="auto" />
            <ColumnDefinition Width="auto" />
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="20" />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="20" />
            <RowDefinition Height="auto" />
            <RowDefinition Height="auto" />
            <RowDefinition Height="auto" />
            <RowDefinition Height="auto" />
            <RowDefinition Height="auto" />
            <RowDefinition Height="*" />
            <RowDefinition Height="20" />
        </Grid.RowDefinitions>

        <TextBlock Grid.Row="1" Grid.Column="1" FontSize="36" 
                   Text="WPF DEMO" Grid.ColumnSpan="3"
                   Margin="0,0,0,10"/>
        <TextBlock Grid.Row="2" Grid.Column="1" Text="FirstName" />
        <TextBox x:Name="FirstName" Grid.Column="2" Grid.Row="2" Width="150" Margin="15,0,0,0"></TextBox>

        <Button x:Name="SubmitButton" Content="Run" Grid.Row="3" 
                Grid.Column="1" Grid.ColumnSpan="2" Margin="10" 
                Click="SubmitButton_OnClick"/>
    </Grid>