Spire.Doc for WPF is an MS Word component which enables user to perform a wide range of Word document processing tasks, including generate, read, write and modify Word document for WPF without Microsoft Office Word Automation. Word versions Spire.Doc for WPF(with high quality and affordable price) supports are Word 97, Word 2003, Word 2007 and Word 2010.
New Feature:
Fixed:
1)File size increased a lot after converted from Doc to PDF.
2)After converted file from Doc to PDF, some original Doc files lost content of the 2nd and 3rd pages.
3)After converted file from Doc to PDF, image position right-moved
4)After converted file from Docx to PDF, page border disappeared.

Rich Functions:
1) Perform mail merge
2) Add Spire.Doc.Reporting.MailMerge.MergeGroupEventHandler which will be invoked before/after the mail merge processes the group/table.
3) Text and paragraph Formatting
4) Find and Replace with string, Regular expression
5) Insert Bookmarks
6) Insert text watermark and picture watermark in Word.
7) Insert formatted text, paragraphs, images Word.
8) Bullets and Numbered Lists
9) Page Setup
10) Track Changes
11) Encryption-Decryption
12) OLE Object Extraction
13) Cloning and Merging

High Performance
high performance for generating Word documents with huge pages. superior performance support for reading and writing Word documents.
More details,
http://www.e-iceblue.com/Introduce/word-for-wpf-introduce.html