RedactTextInWordDocumentNew.cs

using (Redactor redactor = new Redactor(@"Documents/Doc/sample.docx"))
{
    // Use redactor instance to perform redactions
    RedactorChangeLog result = redactor.Apply(new ExactPhraseRedaction("John Doe", new ReplacementOptions("[personal]")));
    foreach (RedactorLogEntry entry in result.RedactionLog)
    {
        Console.WriteLine(entry.Status.ToString());
    }
    redactor.Save();
}

RedactTextInWordDocumentOld.cs

using (Document doc = Redactor.Load(@"Documents/Doc/sample.docx"))
{
    // Use document instance to perform redactions
    RedactionSummary summary = doc.RedactWith(new ExactPhraseRedaction("John Doe", new ReplacementOptions("[personal]")));
    foreach (RedactionLogEntry entry in summary.RedactionLog)
    {
        Console.WriteLine(entry.Status.ToString());
    }
    doc.Save();
}