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internal Joystick[] GetDevice()
        {
            var devices = new List<Joystick>();

            foreach (var device in directInput.GetDevices(DeviceClass.GameControl, DeviceEnumerationFlags.AttachedOnly))
            {
                try
                {
                    Joystick joy = new Joystick(directInput, device.InstanceGuid);
                    devices.Add(joy);
                }
                catch (Exception)
                {
                    return null;
                }
            }

            return devices.ToArray();          
        }					

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internal void InitCombobox(){
    comboBoxLenkrad.ItemsSource = GetDevice();
    comboBoxJoystick.DisplayMemberPath = "Properties.ProductName";
}					

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 private void comboBoxJoystick_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            //  MessageBox.Show(core.SetupJoystick(comboBoxJoystick.SelectedItem as JoyInfo, Joysticks.JoystickType.joystick).ToString());
            Joystick joy = (Joystick) comboBoxJoystick.SelectedItem;

            joy.Acquire();
            JoystickState joyState = new JoystickState();
            joy.GetCurrentState(ref joyState);
            MessageBox.Show(joyState.X.ToString());
        }					

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string name = joy.Properties.ProductName;					

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public class MyJoystick : Joystick
{
  // hier dann die eigene Methode oder Eigenschaft
}					

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        public class MyJoystick : Joystick
        {
            private string TrimFromZero(string input)
            {
                int index = input.IndexOf('\0');
                if (index < 0)
                    return input;

                return input.Substring(0, index);
            }

            public override string ToString()
            {
                return TrimFromZero(Properties.ProductName);             
            }

            public MyJoystick(DirectInput directInput, Guid deviceGuid) : base(directInput, deviceGuid)
            {
                
            }
        }