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Programmatically use the positioning methods of Grid

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     x:Class="grid_getset_methods.Window1"     Title="Grid Methods Sample">     <DockPanel VerticalAlignment="Top" HorizontalAlignment="Left">         <Grid Margin="10" DockPanel.Dock="Left">           <Grid.ColumnDefinitions>             <ColumnDefinition/>           </Grid.ColumnDefinitions>           <Grid.RowDefinitions>             <RowDefinition/>           </Grid.RowDefinitions>           <StackPanel Grid.Column="0" Grid.Row="0" HorizontalAlignment="Left" Orientation="Vertical">             <Button Click="setCol0">Move Rectangle to Column 0</Button>             <Button Click="setCol1">Move Rectangle to Column 1</Button>             <Button Click="setCol2">Move Rectangle to Column 2</Button>             <Button Click="setRow0">Move Rectangle to Row 0</Button>             <Button Click="setRow1">Move Rectangle to Row 1</Button>             <Button Click="setRow2">Move Rectangle to Row 2</Button>             <Button Click="setColspan">Span All Columns</Button>             <Button Click="setRowspan">Span All Rows</Button>           </StackPanel>         </Grid>       <Grid DockPanel.Dock="Top" Name="grid1" ShowGridLines="True" Width="400" Height="400">         <Grid.ColumnDefinitions>         <ColumnDefinition/>       </Grid.ColumnDefinitions>       <Grid.RowDefinitions>         <RowDefinition/>       </Grid.RowDefinitions>         <Rectangle Name="rect1" Fill="Silver" Grid.Column="0" Grid.Row="0"/>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="0" Grid.Row="0" Margin="5">Column 0, Row 0</TextBlock>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="1" Grid.Row="0" Margin="5">Column 1, Row 0</TextBlock>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="2" Grid.Row="0" Margin="5">Column 2, Row 0</TextBlock>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="0" Grid.Row="1" Margin="5">Column 0, Row 1</TextBlock>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="1" Grid.Row="1" Margin="5">Column 1, Row 1</TextBlock>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="2" Grid.Row="1" Margin="5">Column 2, Row 1</TextBlock>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="0" Grid.Row="2" Margin="5">Column 0, Row 2</TextBlock>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="1" Grid.Row="2" Margin="5">Column 1, Row 2</TextBlock>         <TextBlock FontSize="15" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Column="2" Grid.Row="2" Margin="5">Column 2, Row 2</TextBlock>       </Grid>     </DockPanel> </Window> //File:Window.xaml.vb Imports System Imports System.Windows Imports System.Windows.Controls Namespace grid_getset_methods   Public Partial Class Window1     Inherits Window     Private Sub setCol0(sender As Object, e As RoutedEventArgs)       Grid.SetColumn(rect1, 0)       Console.WriteLine("Column " & Grid.GetColumn(rect1).ToString())     End Sub     Private Sub setCol1(sender As Object, e As RoutedEventArgs)       Grid.SetColumn(rect1, 1)       Console.WriteLine("Column " & Grid.GetColumn(rect1).ToString())     End Sub     Private Sub setCol2(sender As Object, e As RoutedEventArgs)       Grid.SetColumn(rect1, 2)       Console.WriteLine("Column " & Grid.GetColumn(rect1).ToString())     End Sub     Private Sub setRow0(sender As Object, e As RoutedEventArgs)       Grid.SetRow(rect1, 0)       Console.WriteLine("Row " & Grid.GetRow(rect1).ToString())     End Sub     Private Sub setRow1(sender As Object, e As RoutedEventArgs)       Grid.SetRow(rect1, 1)       Console.WriteLine("Row " & Grid.GetRow(rect1).ToString())     End Sub     Private Sub setRow2(sender As Object, e As RoutedEventArgs)       Grid.SetRow(rect1, 2)       Console.WriteLine("Row " & Grid.GetRow(rect1).ToString())     End Sub     Private Sub setColspan(sender As Object, e As RoutedEventArgs)       Grid.SetColumnSpan(rect1, 3)       Console.WriteLine("ColumnSpan " & Grid.GetColumnSpan(rect1).ToString())     End Sub     Private Sub setRowspan(sender As Object, e As RoutedEventArgs)       Grid.SetRowSpan(rect1, 3)       Console.WriteLine("RowSpan " & Grid.GetRowSpan(rect1).ToString())     End Sub     Private Sub clearAll(sender As Object, e As RoutedEventArgs)       Grid.SetColumn(rect1, 0)       Grid.SetRow(rect1, 0)       Grid.SetColumnSpan(rect1, 1)       Grid.SetRowSpan(rect1, 1)     End Sub   End Class End Namespace