Protect Word Documents in C# Using .NET Word Library

Protect your sensitive information and control document access with ease. The Syncfusion .NET Word Library (DocIO) empowers you to programmatically encrypt and decrypt Word documents in C# and restrict editing privileges, all without relying on Microsoft Word or interop dependencies.

• Protect Word documents documentation.
• Explore examples of protecting Word documents.
• Protect Word documents online demo.

How to encrypt a Word document with a password in C#

1. Install the NuGet package: Install the Syncfusion.DocIO.Net.Core NuGet package in your project. 
2. Open Word document: Create a FileStream object to represent the input Word document.
3. Load in .NET Word Library: Create a WordDocument object by passing the FileStream object.
4. Encrypt with password: Call the EncryptDocument method of the WordDocument object by passing the password.
5. Save Word document: Save the WordDocument object to the FileStream object.

Here is an example of how to encrypt a Word document in C# using the Syncfusion .NET Word Library (DocIO).

//Load an existing Word document.
using FileStream inputStream = new FileStream("Template.docx", FileMode.Open, FileAccess.Read);
using WordDocument document = new WordDocument(inputStream, FormatType.Docx);

//Encrypt the Word document with a password.
document.EncryptDocument("password");

//Save the Word document.
using FileStream outputStream = new FileStream("Sample.docx", FileMode.Create, FileAccess.Write);
document.Save(outputStream, FormatType.Docx);

How to decrypt a password-protected Word document in C#

1. Install NuGet package: Install the Syncfusion.DocIO.Net.Core NuGet package in your project. 
2. Open password-protected Word document: Create a FileStream object to represent the input Word document.
3. Load in .NET Word Library: Create a WordDocument object by passing the FileStream object and password.
4. Decrypt Word document: Call the RemoveEncryption method of the WordDocument object.
5. Save Word document: Save the WordDocument object to the FileStream object.

Here is an example of how to decrypt a password-protected Word document in C# using the Syncfusion .NET Word Library (DocIO).

//Load an existing Word document with password.
using FileStream inputStream = new FileStream("Template.docx", FileMode.Open, FileAccess.Read);
using WordDocument document = new WordDocument(inputStream, FormatType.Docx, "password");

//Decrypt the Word document.
document.RemoveEncryption();

//Save the Word document.
using FileStream outputStream = new FileStream("Sample.docx", FileMode.Create, FileAccess.Write);
document.Save(outputStream, FormatType.Docx);