How to Save image in SQL 2008 using Silverlight4.0

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Silverlight

Hi Dear ,

this is my table structure

CREATE TABLE [dbo].[M_tbl_Company](
	[Comp_Id] [int] IDENTITY(1,1) NOT NULL,
	[Comp_Name] [varchar](250) NOT NULL,
	[Comp_Address] [nvarchar](500) NOT NULL,
	[Comp_Phone] [nvarchar](15) NOT NULL,
	[Comp_Fax] [nvarchar](15) NOT NULL,
	[LIC_No] [nvarchar](50) NOT NULL,
	[Tax_Id] [nvarchar](50) NOT NULL,
	[IsActive] [bit] NOT NULL,
	[logo] [image] NULL,
	[image] [varchar](50) NULL,

last two days i was working save image in Database ,data type image type and
i m using LINQ with WCF
i have created the WCF service and add in my silver light application


For open the image i use

private void btn_browseImage_Click(object sender, RoutedEventArgs e)
       {
           OpenFileDialog objFileDialog = 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;

           }

       }

and for Save button i use

private void btn_Save_Click(object sender, RoutedEventArgs e)
       {
           _client = new svcPOS.POSClient();
          _client.SaveCompanyCompleted +=new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(_client_SaveCompanyCompleted);
          svcPOS.M_tbl_Company _company = new svcPOS.M_tbl_Company();

               _company.Comp_Name = txt_companyName.Text;
               _company.Comp_Address = txt_companyAddress.Text;
               _company.Comp_Phone = txt_phoneno.Text;
               _company.Comp_Fax = txt_faxno.Text;
               _company.Tax_Id = txt_taxId.Text;
               _company.LIC_No = txt_LicNo.Text;

              //******************  how can i set image Here ********************
              _company.logo=?????? // what i write here 

all other data proper save in database ..
only image is remaining


"thanks for your reply in advance"