Save the data as BLOB to a database

Hi,

I have this code to save the data from a txtbox into a database column called Data.
But I want it to be saved as blob data?

Who can help me?

Peter

private void txtbNotes_TextChanged(object sender, EventArgs e)
        {
            TreeNode node = tvNotes.SelectedNode;
            DataRow ParentRow = null;
            ParentRow = (DataRow)node.Tag;
            ParentRow["Data"] = txtbNotes.Text;
        }

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