Thank you all for trying to help ------

I solved the problem and  Here is my final code

try

{

LoginPage login=new LoginPage();

BitmapImage DriverPhoto=new BitmapImage();

DriverPhoto.BeginInit();

DriverPhoto.UriSource =new Uri(@"\\"+login.ServerName+"\\Photos\\MyPhoto.jpg");

DriverPhoto.EndInit();

DriverImageControl.Source=DriverPhoto;

}

catch(System.Exception ex)

{

System.Windows.MessageBox.Show(ex.Message);

}

Check you path which you are sharing first. If are using peer to peer network then should not have any problem.Then check you code. Try Msdn library. Type your answer then see answer you I get most of answer either from or Msdn library. Also try  microsoft technet for developer.