How to Assign Image to object for Saving in Database

I want to Save image to Database.The image is selected by Browsing and is loaded to Imagebox in silverlight application in C#.Net. I want to assign this loaded image to Object that is used to Saving the data. Below is my Code.

private void btnBrowse_Click(object sender, RoutedEventArgs e)
        {
OpenFileDialog objFileDia开发者_StackOverflow中文版log = new OpenFileDialog();
            bool? IsSelected = objFileDialog.ShowDialog();
            objFileDialog.Filter = "Pictures (*.jpg)|*.jpg";
            objFileDialog.FilterIndex = 1;
            if (IsSelected == true)
            {

                BitmapImage bitImage = new BitmapImage();
                bitImage.SetSource(objFileDialog.File.OpenRead());
                image1.Source = bitImage;
                //Image1 is object of Image
            }  
}

Code of Object that is carrying Data to Save Method in Service File.

private void btnSave_Click(object sender, RoutedEventArgs e)
    {

      var objData = new ServiceReference1.Data_Registration();
      objData .AY_ID = newAcadYearId;
      objData .CellNo = txtCellNo.Text;
      objData .ImageId = ;
      services.DataRegAsync(objAlumni);
    }

Please Suggest how can i assign Selected Image to my Object objdata.