void IFieldMergingCallback.FieldMerging(FieldMergingArgs e)
{
// All merge fields that expect HTML data should be marked with some prefix, e.g. 'html'.
if (e.DocumentFieldName.StartsWith("html"))
{
// Insert the text for this merge field as HTML data, using DocumentBuilder.
DocumentBuilder builder = new DocumentBuilder(e.Document);
builder.MoveToMergeField(e.DocumentFieldName);
builder.InsertHtml((string)e.FieldValue);
// The HTML text itself should not be inserted.
// We have already inserted it as an HTML.
e.Text = "";
}
}