WPF GridSplitter - An Advanced Control

xmlns:syncfusion="http://schemas.syncfusion.com/wpf"
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="5" />
        <ColumnDefinition Width="*" />
    </Grid.ColumnDefinitions>
    <TextBlock Grid.Column="0" Text="Left Panel" />
    <syncfusion:SfGridSplitter Grid.Column="1" ResizeBehavior="PreviousAndNext" ResizeDirection="Auto" Width="5" />
    <TextBlock Grid.Column="2" Text="Right Panel" />
</Grid>

using Syncfusion.Windows.Controls.Input; 
namespace WpfApp1 
{ 
    public partial class MainWindow : Window 
    { 
        public MainWindow() 
        { 
            InitializeComponent(); 
var col1 = new ColumnDefinition() { Width = new GridLength(1, GridUnitType.Star) };
var col2 = new ColumnDefinition() { Width = new GridLength(5, GridUnitType.Pixel) };
var col3 = new ColumnDefinition() { Width = new GridLength(1, GridUnitType.Star) };
grid.ColumnDefinitions.Add(col1);
grid.ColumnDefinitions.Add(col2);
grid.ColumnDefinitions.Add(col3);
var leftTextBlock = new TextBlock() { Text = "Left Panel" };
Grid.SetColumn(leftTextBlock, 0);
grid.Children.Add(leftTextBlock);
var splitter = new SfGridSplitter() { ResizeBehavior = GridResizeBehavior.PreviousAndNext, ResizeDirection = GridResizeDirection.Auto, Width = 5 };
Grid.SetColumn(splitter, 1);
grid.Children.Add(splitter);
var rightTextBlock = new TextBlock() { Text = "Right Panel" };
Grid.SetColumn(rightTextBlock, 2);
grid.Children.Add(rightTextBlock);
        } 
    } 
}