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<Window x:Class="WpfApp1.Window3"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp1"
        mc:Ignorable="d"
        Title="Window3" Height="450" Width="800">
    <Grid>
        <Grid>
            <TabControl>
                <TabItem Header="Insert">
                    <Label Content="Content goes here..." />
                </TabItem>
                <TabItem Header="Scd" />
                <TabItem Header="Admin" />
            </TabControl>
        </Grid>
    </Grid>
</Window>