How to read .NET Reactor license programmatically

.NET Reactor is a code protection and licensing system for .NET applications. It has SDK, that supports maintaining licenses within your devops toolkits.

I will not cover the license generation part in this post, but you can check the documentation for more details.

Normally .NET Reactor produces *.license files that can be put in the same folder as your protected application. If you want to examine the license, you can use the GUI, but I will focus on C# SDK approach.

To read a license file, you need to:

1. Add a NuGet package Eziriz.Reactor.LicenseGenerator to your project.
2. Have ProjectFile with MasterKey ready. If your MasterKey is not part of the project file, you need to load it separately. MasterKey is needed to decrypt the license file.
3. Add this short piece of code:

public void ViewLicenseInformation(string projectFile, string licenseFile)
{
    //load project file with LicenseGenerator
    var licenseReader = new LicenseGenerator(projectFile);
    
    //load license file you want to inspect
    licenseReader.LoadLicenseFromFile(licenseFile);
    
    //Read license property, here is a simple example
    Console.WriteLine($"ExpiryDate: {licenseReader.ExpirationDate}");
    Console.WriteLine("Reading Additional Values:");
    
    foreach (DictionaryEntry value in licenseReader.KeyValueTable)
    {
        Console.WriteLine($"{value.Key}: {value.Value}");
    }
}

This will print out ExpiryDate and two additional custom values:

ExpiryDate: 31/12/2024 00:00:00
Company: My Company
Property1: 100000000

I hope this helps :).