<Window x:Class="TabControlApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:syncfusion="http://schemas.syncfusion.com/wpf"
        Title="TabControl Example" Height="450" Width="800">

    <Grid>
        <syncfusion:TabControlExt Name="tabControl" Height="100" Width="280">
            <syncfusion:TabItemExt Header="Tab 1">
                <TextBlock Text="Content of Tab 1" />
            </syncfusion:TabItemExt>
            <syncfusion:TabItemExt Header="Tab 2">
                <TextBlock Text="Content of Tab 2" />
            </syncfusion:TabItemExt>
            <syncfusion:TabItemExt Header="Tab 3">
                <TextBlock Text="Content of Tab 3" />
            </syncfusion:TabItemExt>
        </syncfusion:TabControlExt>
    </Grid>
</Window>

using Syncfusion.Windows.Tools.Controls;

public partial class MainWindow : Window {
    public MainWindow() {
        InitializeComponent();

        // Create TabControl instance
        TabControlExt tabControlExt = new TabControlExt();
        tabControlExt.Height = 100;
        tabControlExt.Width = 280;

        // Create and add TabItems
        TabItemExt tabItem1 = new TabItemExt() 
        {
            Header = "Tab 1",
            Content = new TextBlock() { Text = "Content of Tab 1" }
        };

        TabItemExt tabItem2 = new TabItemExt() 
        {
            Header = "Tab 2",
            Content = new TextBlock() { Text = "Content of Tab 2" }
        };

        tabControlExt.Items.Add(tabItem1);
        tabControlExt.Items.Add(tabItem2);

        this.Content = tabControlExt;
    }
}

// Handle tab selection changes
tabControl.SelectedItemChangedEvent += TabControl_SelectedItemChangedEvent;

private void TabControl_SelectedItemChangedEvent(object sender, SelectedItemChangedEventArgs e)
{
    var newTabItem = e.NewSelectedItem.Header;
    var oldTabItem = e.OldSelectedItem?.Header ?? "None";
    MessageBox.Show($"Changed from {oldTabItem} to {newTabItem}");
}

<!-- Enable close buttons on both TabControl and TabItems -->
<syncfusion:TabControlExt CloseButtonType="Both" Name="tabControl">
    <syncfusion:TabItemExt Header="Tab 1" />
    <syncfusion:TabItemExt Header="Tab 2" CanClose="False" />
</syncfusion:TabControlExt>

<!-- Position tabs at the bottom -->
<syncfusion:TabControlExt TabStripPlacement="Bottom" Name="tabControl">
    <syncfusion:TabItemExt Header="Tab 1" />
    <syncfusion:TabItemExt Header="Tab 2" />
</syncfusion:TabControlExt>

<syncfusion:TabControlExt IsNewButtonEnabled="True" 
                          NewButtonClick="TabControl_NewButtonClick"
                          Name="tabControl" />

private void TabControl_NewButtonClick(object sender, EventArgs e)
{
    TabItemExt newItem = new TabItemExt() 
    {
        Header = $"Tab {tabControl.Items.Count + 1}",
        Content = new TextBlock() { Text = "New tab content" }
    };
    tabControl.Items.Add(newItem);
}

<syncfusion:TabControlExt TabScrollButtonVisibility="Visible"
                          TabScrollStyle="Extended"
                          Name="tabControl" />