private void BTN_UploudImage_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog filedialog = new OpenFileDialog();

            filedialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
            filedialog.Filter           = "All Files|*.*|JPEGs|*.jpg|Bitmaps|*.bmp";
            filedialog.FilterIndex      = 2;
            if (filedialog.ShowDialog() == true)
            {
                BitMap      = File.ReadAllBytes($@"{filedialog.FileName}");
                PicturePath = filedialog.FileName;
                ShowImage();
            }
            GroupControl_Logic.UpdateImg(groupId, BitMap);
        }