How to programatically (C#) determine the pages count of .docx files

Question

I have about 400 files in .docx format, and I need to determine the length of each in #pages.

So, I want to write C# code for selecting the folder that contains the

Answer 1

Modern solution (based on Jignesh Thakker's answer): Open XML SDK is no longer there, but it is published on Github and even support .NET Core. You do not need MS Office on the server/running machine.

Install the Nuget package:

Install-Package DocumentFormat.OpenXml

The code:

using DocumentFormat.OpenXml.Packaging;

private int CountWordPage(string filePath)
{
    using (var wordDocument = WordprocessingDocument.Open(filePath, false))
    {
        return int.Parse(wordDocument.ExtendedFilePropertiesPart.Properties.Pages.Text);
    }
}