Install GroupDocs.Assembly for .NET and Apply License Leave feedback

Before you can start generating documents with GroupDocs.Assembly for .NET, you need to install the library and apply a license. This guide shows you how to install the package via NuGet and configure licensing to remove evaluation limitations.

The main classes involved are:

• License - for applying licenses
• DocumentAssembler - for assembling documents

Here are the steps to get started:

• Install GroupDocs.Assembly package via NuGet Package Manager or Package Manager Console
• Apply a license from a file or stream using the License.SetLicense method
• Verify that the license is applied correctly before using DocumentAssembler

Note

Calling License.SetLicense multiple times is not harmful but wastes processor time. In Windows Forms or console applications, call it once during startup. In ASP.NET applications, call it in Application_Start method in Global.asax.cs.

The easiest way to install GroupDocs.Assembly is through NuGet Package Manager in Visual Studio.

1. Right-click your project in Solution Explorer
2. Select “Manage NuGet Packages”
3. Search for “GroupDocs.Assembly”
4. Click “Install” to install the latest version

Alternatively, you can install the package using Package Manager Console:

// Run this command in Package Manager Console:
// Install-Package GroupDocs.Assembly

After installation, apply your license file to remove evaluation limitations:

using GroupDocs.Assembly;

public static void ApplyLicenseFromFile()
{
    // Path to your license file
    string licensePath = "GroupDocs.Assembly.lic";
    
    // Apply the license
    License license = new License();
    license.SetLicense(licensePath);
    
    Console.WriteLine("License applied successfully from file.");
}

You can also load a license from a stream:

using GroupDocs.Assembly;
using System.IO;

public static void ApplyLicenseFromStream()
{
    // Load license file into a stream
    using (FileStream stream = new FileStream("GroupDocs.Assembly.lic", FileMode.Open))
    {
        License license = new License();
        license.SetLicense(stream);
        
        Console.WriteLine("License applied successfully from stream.");
    }
}

To verify that your license is applied correctly, you can check for evaluation watermarks in generated documents. If no watermarks appear, the license is active.

using GroupDocs.Assembly;

public static void VerifyLicense()
{
    License license = new License();
    license.SetLicense("GroupDocs.Assembly.lic");
    
    // Try to assemble a simple document
    DocumentAssembler assembler = new DocumentAssembler();
    // If license is valid, no evaluation watermark will appear
    Console.WriteLine("License verification: Check generated documents for watermarks.");
}

Warning

The license file contains a digital signature. Do not modify the license file, as even adding an extra line break will invalidate it.

To learn more about licensing options including metered licensing, please refer to the advanced usage section.

You may easily run the code above and see the feature in action in our GitHub examples:

• GroupDocs.Assembly for .NET examples, plugins, and showcase
• GroupDocs.Assembly for Java examples, plugins, and showcase
• GroupDocs.Assembly for Python via .NET examples, plugins, and showcase

Along with the full-featured .NET library, we provide simple but powerful free online apps.

To assemble documents from templates and data sources, you can use the online apps from the GroupDocs.Assembly App Product Family.