<UserControl x:Class="NAGermanLocalization1.MainPage"
    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"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400" xmlns:ig="http://schemas.infragistics.com/xaml">

    <Grid x:Name="LayoutRoot" Background="White">
        <ig:XamGrid HorizontalAlignment="Left" Name="xamGrid1" VerticalAlignment="Top"  AutoGenerateColumns="false"  >
            <ig:XamGrid.FilteringSettings>
                <ig:FilteringSettings AllowFiltering="FilterMenu" />
            </ig:XamGrid.FilteringSettings>
            <ig:XamGrid.GroupBySettings>
                <ig:GroupBySettings AllowGroupByArea="Top" />
            </ig:XamGrid.GroupBySettings>
            <ig:XamGrid.Columns>
                <ig:TextColumn Key="Id" />
                <ig:TextColumn Key="Name"/>
                <ig:TextColumn Key="Vorname"/>
                <ig:TextColumn Key="Land" />
            </ig:XamGrid.Columns>
        </ig:XamGrid>
    </Grid>
</UserControl>

using System.Collections.Generic;
using System.Windows.Controls;

namespace NAGermanLocalization1
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
            InitGrid();
        }

        private void InitGrid()
        {
             List<Kunde> kunden = new List<Kunde>();
            for (int i = 0; i<10; i++)
            {
                Kunde kunde = new Kunde{Id = i, Name = string.Format("Name {0}", i), Vorname = string.Format("Vorname {0}", i), Land = "DE"};
                kunden.Add(kunde);
            }
            xamGrid1.ItemsSource = kunden;
        }
    }

    public class Kunde
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Vorname { get; set; }
        public string Land { get; set; }
    }
}