How do I use open xml sdk in my mvc project?

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After struggling to get my word document to act right on my local machine, I understand my server does not have Microsoft Office. I am trying to open, modify, save and display a document. I figured out the OPEN XML SDK 2.0 is the way to go. I just download this program this morning and I don't know how to integrate this in my code. How do I go about doing this? I am flying blind, this is what I would like to do. This code works with office\[code\]object pathToUse = Server.MapPath("~/Document/TemplateX.docx");object pathToSave = Server.MapPath("~/Document/FinishedX.docx");//open filetempDoc = wordApp.Documents.Open(ref pathToUse, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref isVisible, ref missing, ref missing, ref missing, ref missing);//Make edits - I had this for my word documentthis.FindAndReplace(Application wordApp, "<date>", DateTime.Today.ToShortDateString());//savetempDoc.SaveAs(ref pathToSave, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref isVisible, ref missing, ref missing, ref missing, ref missing);//return file in my Controllerreturn File(pathToSave.ToString(), "docx");\[/code\]I just added code to show I had what was needed but the lack of Microsoft curve ball hurt my mental roll. Thanks in advance. HELP!