C#

<Window x:Class="WpfApplicationTest1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        WindowStyle="None"
        WindowState="Maximized"
        ResizeMode="NoResize"
        Topmost="True">

namespace WpfApplicationTest1
{
  public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();
      WindowStyle = WindowStyle.None;
      WindowState = WindowState.Maximized;
      ResizeMode = ResizeMode.NoResize;
      Topmost = true;
    }
  }
}

aymen amri wrote:

but with this solution the windows expolorer still work, for example when I push the keybord start button it still works

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

BillWoodruff wrote:

Have you lived in India, or is there a family connection with the Raj ?

BillWoodruff wrote:

Hope my response to you did not seem patronizing

using (var fileStream = File.OpenRead(@"Path\To\Your\File.bin"))
using (var deCompressionStream = new GZipStream(fileStream, CompressionMode.Decompress))
{
   var bFormatter = new BinaryFormatter();
   object obj = bFormatter.Deserialize(deCompressionStream);
}

using (var fileStream = File.OpenRead(filePath))
using (var deCompressionStream = new GZipStream(fileStream, CompressionMode.Decompress))
{
    var bFormatter = new BinaryFormatter();

    // put a break-point here: examine obj
    // this works !
    object obj = bFormatter.Deserialize(fileStream);

    // for testing only
    return null;
}

using System;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System.IO.Compression;

[Serializable()]
class SumTestClass
{
    public int TestInt { get; set; }
    public string TestString { get; set; }
    public SumTestClass()
    {
        TestInt = 42;
        TestString = "Hello World";
    }
}

static class Program
{
    static BinaryFormatter bf = new BinaryFormatter();
    static void Main(string[] args)
    {
        object thingyToSerialize = new SumTestClass();

        // ..or use a memorystream :)
        using (var ms = new FileStream("C:\\Temp\\Test.zip", FileMode.Create)) 
        using (var zs = new GZipStream(ms, CompressionMode.Compress, leaveOpen: true))
        {
            bf.Serialize(zs, thingyToSerialize);
            Console.WriteLine("Stuff saved");
        }
        
        using (var ms = new FileStream("C:\\Temp\\Test.zip", FileMode.Open)) 
        using (var zs = new GZipStream(ms, CompressionMode.Decompress, leaveOpen: true))
        {
            SumTestClass testResult = bf.Deserialize(zs) as SumTestClass;
            Console.WriteLine("String: {0}\nInt: {1}", testResult.TestString, testResult.TestInt);
        }

        Console.ReadLine();
    }
}

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]