<Window x:Class="WpfApplication2.MainWindow"
        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:WpfApplication2"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="5" />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <StackPanel Width="150" Grid.Column="0">
            <Button x:Name="button" Content="Load" Click="button_Click"/>
            <Label x:Name="label" Content="{Binding Linie}"/>
            <Label x:Name="label1" Content="{Binding Pola}"/>
            <Label x:Name="label2" Content="{Binding Litery}"/>
        </StackPanel>
        <GridSplitter x:Name="gridSplitter" Width="5" HorizontalAlignment="Stretch" Grid.Column="1"/>
        <DockPanel LastChildFill="True" Grid.Column="2" Margin="0,21,0,0">
            <WrapPanel x:Name="wrap" Margin="0,-19,0,0"/>
            <ListBox Margin="0,-19,0,0">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <Label Content="{Binding Collection}"/>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
        </DockPanel>
    </Grid>
</Window>

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication2
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public string Linie
        {
            get { return (string)GetValue(LinieProperty); }
            set { SetValue(LinieProperty, value); }
        }

        public string Pola
        {
            get { return (string)GetValue(PolaProperty); }
            set { SetValue(PolaProperty, value); }
        }

        public string Litery
        {
            get { return (string)GetValue(LiteryProperty); }
            set { SetValue(LiteryProperty, value); }
        }

        public static readonly DependencyProperty LinieProperty = DependencyProperty.Register("Linie", typeof(string), typeof(MainWindow));
        public static readonly DependencyProperty PolaProperty = DependencyProperty.Register("Pola", typeof(string), typeof(MainWindow));
        public static readonly DependencyProperty LiteryProperty = DependencyProperty.Register("Litery", typeof(string), typeof(MainWindow));

        public ObservableCollection<string> collectionn = new ObservableCollection<string>();

        public ObservableCollection<string> Collection
        {
            get; set;
        }


        public MainWindow()
        {
            this.DataContext = this;
            InitializeComponent();
        }

        private void button_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog theDialog = new OpenFileDialog();
            theDialog.Title = "Open Text File";
            theDialog.Filter = "TXT files|*.txt";
            theDialog.InitialDirectory = @"C:\";
            if (theDialog.ShowDialog() == true)
            {
                string filename = theDialog.FileName;
                //label3.Content = filename;

                string[] filelines = File.ReadAllLines(filename);
                //label.Content = filelines.Length.ToString() + " linii";


                int slowa = 0;
                int litery = 0;
                string[] labels = filelines[0].Split(',');

                for (int a = 0; a < filelines.Length; a++)
                {
                    //if (a == 0)
                    //{
                    //    for (int i = 0; i < filelines[a].Split(',').Length; i++)
                    //    {
                    //        labels[i] = filelines[a].Split(',')[i].ToString() + " ";
                    //    }
                    //    wrap.Children.Add(new TextBlock
                    //    {
                    //        Width = 999,
                    //        Text = labels[0],
                    //        Margin = new Thickness(5)
                    //    });
                    //}
                    //else
                    //{
                        String[] substrings = filelines[a].Split(',');
                        slowa += substrings.Length;
                        litery += filelines[a].Length;


                        string text = "";

                        for (int i = 0; i < filelines[a].Split(',').Length; i++)
                        {
                            text += labels[i] + ": " + filelines[a].Split(',')[i].ToString() + " ";
                        }
                    wrap.Children.Add(new TextBlock
                    {
                        Width = 80,
                        Text = text,
                        Margin = new Thickness(5)
                    });
                    //Collection.Add(text);
                //}

            }


                //label1.Content = slowa.ToString() + " słów";
                //label2.Content = litery.ToString() + " liter";

                Linie = filelines.Length.ToString() + " linii";
                Pola = slowa.ToString() + " słów";
                Litery = litery.ToString() + " liter";
            }
        }
    }
}