Generate a document with the following approach: https://docs.telerik.com/devtools/document-processing/knowledge-base/populate-table-data-mail-merge

Before calling MailMerge, add two document variables with the editor: https://docs.telerik.com/devtools/document-processing/libraries/radwordsprocessing/concepts/fields/document-variables 

 Replace cannot match whole word with special characters (e.g. "#", "@", "&") at the start/end.

Workaround (RegEx):

editor.ReplaceText(new Regex($"(?<=\\s|^|[\\c_]){placeholder}(?=\\s|$|[\\c_])"),"new content");

Add support for Picture Styles.

InvalidOperationException when cloning a document containing fields spanning multiple paragraphs.

Workaround: instead of new paragraphs, use line breaks (Shift+Enter).

The default vertical alignment value of table data (<td>) is incorrect.

Current: "vertical-align: top;"

Expected: "vertical-align: middle;"

Workaround: Explicitly set the "vertical-align: middle;" of <td> elements.

More information about the feature can be found here: https://support.microsoft.com/en-us/office/add-or-remove-line-numbers-b67cd35e-422c-42eb-adc9-256ca9802e22

XmlException is thrown when importing documents containing DAT files.

RadFlowDocument flowDocument;
using (Stream str = new FileStream("input.docx", FileMode.OpenOrCreate))
{
    MemoryStream ms = new MemoryStream();
    str.CopyTo(ms);
    ms.Seek(0, SeekOrigin.Begin);

    using (ZipArchive archive = ZipArchive.Update(ms, null))
    {
        var zipEntries = archive.Entries;

        // Skip glossary on importfor (int i = zipEntries.Count() - 1; i >= 0; i--)
        {
            var entry = zipEntries.ElementAt(i);
            string entryName = entry.FullName;
            if (Regex.IsMatch(entryName, @"\[trash\]"))
            {
                entry.Delete();
            }
        }
    }
}       

Restrict the TableCellProperties API of a style according to specification.

Center alignment is not respected for list numbering.

Expected:

Actual: