Hi Tom,
Thank you for your interest in Syncfusion Essential DocIO.
We do have a support for load an existing MS word template document. Here is the code snippet your reference,
// Creating a new document.
WordDocument document = new WordDocument();
// Open an existing template document.
document.Open ( @"..\..\Data\Template.doc", FormatType.Doc );
// Saving the document to disk.
document.Save ( "Sample.doc" , FormatType.Doc );
Please refer the attached sample and let me know if you have any questions.
Thanks,
Prabhu.
Load_Document.zip