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Issue with persisting from MemoryStream in XamlPackage format

Posted By:      Posted Date: October 22, 2010    Points: 0   Category :WPF

I am trying to persist some data from a rich text box to a BLOB in a database

		void TestCode2()
			TextRange range = new TextRange(this.richTextBox1.Document.ContentStart, this.richTextBox1.Document.ContentEnd);

			MemoryStream mem = new MemoryStream();

			range.Save(mem, System.Windows.DataFormats.XamlPackage);

			byte[] persist = mem.GetBuffer();

			MemoryStream mem2 = new MemoryStream(persist);
				range.Load(mem2, System.Windows.DataFormats.XamlPackage);
			catch (ArgumentException ex)
				System.Diagnostics.Debug.WriteLine(string.Format("Exception {0}", ex.Message));

The code above summarizes what I am trying to do.

But the main problem is an ArgumentException is being thrown.

But if do the following everything works OK:

		void TestCode()
			TextRange range =  

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