C#打印Word文档，网上不少文章，不过步骤普遍复杂，简单的方法整理如下：

参考：https://stackoverflow.com/questions/25483754/print-word-document-using-c-sharp

需要引用：Microsoft.Office.Interop.Word

下载dll: https://download.csdn.net/download/zhouyingge1104/10992883

using System.Drawing;
using System.Drawing.Printing;
using Microsoft.Office.Interop.Word;

//...

Microsoft.Office.Interop.Word.Application winword = new Microsoft.Office.Interop.Word.Application();
winword.Visible = false;
object missing = System.Reflection.Missing.Value;
Microsoft.Office.Interop.Word.Document document = winword.Documents.Add(ref missing, ref missing, ref missing, ref missing);
//读取word文件或者模板
string tempPath = "d://report.doc";
document = winword.Documents.Open(tempPath);

//对word文档做一些处理
//...

document.PrintOut(); //打印
document.Close();

关键的一步是document.PrintOut()方法。