How Can I Modify Extended File Properties (Like Company) in Word or PDF Documents Using .NET?

Setting Extended File Properties in .NET

If you need to modify the Company field value or other extended file properties within Word or PDF documents, here's how you can do it using .NET:

1. Install NuGet Packages:
   Add the following NuGet packages to your project:

   • Microsoft.WindowsAPICodePack-Shell
   • Microsoft.WindowsAPICodePack-Core
2. Read and Write Properties:
   In your C# code, use the Microsoft.WindowsAPICodePack.Shell and Microsoft.WindowsAPICodePack.Shell.PropertySystem namespaces to read and write file properties. Here's an example:

using Microsoft.WindowsAPICodePack.Shell;
using Microsoft.WindowsAPICodePack.Shell.PropertySystem;

string filePath = @".\example.docx";
var file = ShellFile.FromFilePath(filePath);

// Read the old properties
string[] oldAuthors = file.Properties.System.Author.Value;

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