Finding the richtextbox what excetly contains

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C#

WPF

hi

i am working on the richtextbox,

iam inserting the image in the richtextbox
here is the sample code

FlowDocument flb = new FlowDocument();
               BitmapImage bitmapSmiley = new BitmapImage(new Uri(cboImageSample.SelectedItem.ToString() + ".png", UriKind.Relative));
               Paragraph para = new Paragraph();
               Image image = new Image();
               image.Source = bitmapSmiley;
               image1.Source = bitmapSmiley;
               image.Height = 20;
               image.Width = 20;
               image.Tag = cboImageSample.SelectedItem.ToString() + ".png";
               para.Inlines.Add(image);
               richTextBox2.Document.Blocks.Add(para);

so that i want to read the data what excately it contains with including the images
or other wise i am inserting the image in richtextbox2 with the tag name also so that i can find the image in the line

so how can i find the images or image tag


thanks in advanced