diff --git a/src/OpenNetty.Daemon/Program.cs b/src/OpenNetty.Daemon/Program.cs
index 42dc4c9..b962455 100644
--- a/src/OpenNetty.Daemon/Program.cs
+++ b/src/OpenNetty.Daemon/Program.cs
@@ -1,4 +1,10 @@
-using System.Reactive.Linq;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Reactive.Linq;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 
diff --git a/src/OpenNetty.Mqtt/IOpenNettyMqttWorker.cs b/src/OpenNetty.Mqtt/IOpenNettyMqttWorker.cs
index 90c8352..5010aeb 100644
--- a/src/OpenNetty.Mqtt/IOpenNettyMqttWorker.cs
+++ b/src/OpenNetty.Mqtt/IOpenNettyMqttWorker.cs
@@ -1,4 +1,10 @@
-using System.Threading.Channels;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Threading.Channels;
 using MQTTnet;
 using MQTTnet.Extensions.ManagedClient;
 
diff --git a/src/OpenNetty.Mqtt/OpenNettyMqttAttributes.cs b/src/OpenNetty.Mqtt/OpenNettyMqttAttributes.cs
index 420794f..3181927 100644
--- a/src/OpenNetty.Mqtt/OpenNettyMqttAttributes.cs
+++ b/src/OpenNetty.Mqtt/OpenNettyMqttAttributes.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty.Mqtt;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty.Mqtt;
 
 /// <summary>
 /// Exposes common attributes supported by the OpenNetty MQTT integration.
diff --git a/src/OpenNetty.Mqtt/OpenNettyMqttBuilder.cs b/src/OpenNetty.Mqtt/OpenNettyMqttBuilder.cs
index 2df8702..ed76710 100644
--- a/src/OpenNetty.Mqtt/OpenNettyMqttBuilder.cs
+++ b/src/OpenNetty.Mqtt/OpenNettyMqttBuilder.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using System.Xml.Linq;
 using Microsoft.Extensions.FileProviders;
 using MQTTnet.Client;
diff --git a/src/OpenNetty.Mqtt/OpenNettyMqttConfiguration.cs b/src/OpenNetty.Mqtt/OpenNettyMqttConfiguration.cs
index 6915c44..2271689 100644
--- a/src/OpenNetty.Mqtt/OpenNettyMqttConfiguration.cs
+++ b/src/OpenNetty.Mqtt/OpenNettyMqttConfiguration.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using Microsoft.Extensions.Options;
 
 namespace OpenNetty.Mqtt;
diff --git a/src/OpenNetty.Mqtt/OpenNettyMqttExtensions.cs b/src/OpenNetty.Mqtt/OpenNettyMqttExtensions.cs
index 1f031e3..0ab6769 100644
--- a/src/OpenNetty.Mqtt/OpenNettyMqttExtensions.cs
+++ b/src/OpenNetty.Mqtt/OpenNettyMqttExtensions.cs
@@ -1,4 +1,10 @@
-using Microsoft.Extensions.DependencyInjection.Extensions;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Options;
 using MQTTnet;
 using MQTTnet.Extensions.ManagedClient;
diff --git a/src/OpenNetty.Mqtt/OpenNettyMqttHostedService.cs b/src/OpenNetty.Mqtt/OpenNettyMqttHostedService.cs
index 6e790ba..de40047 100644
--- a/src/OpenNetty.Mqtt/OpenNettyMqttHostedService.cs
+++ b/src/OpenNetty.Mqtt/OpenNettyMqttHostedService.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using System.Globalization;
 using System.Net.Mime;
 using System.Reactive.Disposables;
diff --git a/src/OpenNetty.Mqtt/OpenNettyMqttOperation.cs b/src/OpenNetty.Mqtt/OpenNettyMqttOperation.cs
index 7d43366..901fd77 100644
--- a/src/OpenNetty.Mqtt/OpenNettyMqttOperation.cs
+++ b/src/OpenNetty.Mqtt/OpenNettyMqttOperation.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty.Mqtt;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty.Mqtt;
 
 /// <summary>
 /// Represents an OpenNetty MQTT operation.
diff --git a/src/OpenNetty.Mqtt/OpenNettyMqttOptions.cs b/src/OpenNetty.Mqtt/OpenNettyMqttOptions.cs
index 1f844da..2dc3806 100644
--- a/src/OpenNetty.Mqtt/OpenNettyMqttOptions.cs
+++ b/src/OpenNetty.Mqtt/OpenNettyMqttOptions.cs
@@ -1,4 +1,10 @@
-using MQTTnet.Client;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using MQTTnet.Client;
 
 namespace OpenNetty.Mqtt;
 
diff --git a/src/OpenNetty.Mqtt/OpenNettyMqttWorker.cs b/src/OpenNetty.Mqtt/OpenNettyMqttWorker.cs
index 63cd2c3..58d938e 100644
--- a/src/OpenNetty.Mqtt/OpenNettyMqttWorker.cs
+++ b/src/OpenNetty.Mqtt/OpenNettyMqttWorker.cs
@@ -1,4 +1,10 @@
-using System.Globalization;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Globalization;
 using System.Net.Mime;
 using System.Reactive.Concurrency;
 using System.Reactive.Linq;
diff --git a/src/OpenNetty/IOpenNettyHandler.cs b/src/OpenNetty/IOpenNettyHandler.cs
index b1b2315..8d07852 100644
--- a/src/OpenNetty/IOpenNettyHandler.cs
+++ b/src/OpenNetty/IOpenNettyHandler.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents an OpenNetty handler whose lifetime is controlled by the OpenNetty hosted service.
diff --git a/src/OpenNetty/IOpenNettyPipeline.cs b/src/OpenNetty/IOpenNettyPipeline.cs
index 981d816..ee371c3 100644
--- a/src/OpenNetty/IOpenNettyPipeline.cs
+++ b/src/OpenNetty/IOpenNettyPipeline.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 
 namespace OpenNetty;
 
diff --git a/src/OpenNetty/IOpenNettyService.cs b/src/OpenNetty/IOpenNettyService.cs
index 49f1fce..640afd6 100644
--- a/src/OpenNetty/IOpenNettyService.cs
+++ b/src/OpenNetty/IOpenNettyService.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 
 namespace OpenNetty;
 
diff --git a/src/OpenNetty/IOpenNettyWorker.cs b/src/OpenNetty/IOpenNettyWorker.cs
index a0ae693..d7d23ae 100644
--- a/src/OpenNetty/IOpenNettyWorker.cs
+++ b/src/OpenNetty/IOpenNettyWorker.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using System.Threading.Channels;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyAddress.cs b/src/OpenNetty/OpenNettyAddress.cs
index d29dd83..cf1d22f 100644
--- a/src/OpenNetty/OpenNettyAddress.cs
+++ b/src/OpenNetty/OpenNettyAddress.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Globalization;
 using System.Text;
diff --git a/src/OpenNetty/OpenNettyAddressType.cs b/src/OpenNetty/OpenNettyAddressType.cs
index 8410739..f0d6a1e 100644
--- a/src/OpenNetty/OpenNettyAddressType.cs
+++ b/src/OpenNetty/OpenNettyAddressType.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty address types, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyBrand.cs b/src/OpenNetty/OpenNettyBrand.cs
index 0d85beb..0e821aa 100644
--- a/src/OpenNetty/OpenNettyBrand.cs
+++ b/src/OpenNetty/OpenNettyBrand.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents the brand of an OpenNetty device.
diff --git a/src/OpenNetty/OpenNettyBuilder.cs b/src/OpenNetty/OpenNettyBuilder.cs
index 7fd630f..e4ee95d 100644
--- a/src/OpenNetty/OpenNettyBuilder.cs
+++ b/src/OpenNetty/OpenNettyBuilder.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.ComponentModel;
 using System.Globalization;
 using System.IO.Ports;
diff --git a/src/OpenNetty/OpenNettyCapabilities.cs b/src/OpenNetty/OpenNettyCapabilities.cs
index 80f330c..9331c73 100644
--- a/src/OpenNetty/OpenNettyCapabilities.cs
+++ b/src/OpenNetty/OpenNettyCapabilities.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common capabilities supported by OpenNetty endpoints or devices.
diff --git a/src/OpenNetty/OpenNettyCapability.cs b/src/OpenNetty/OpenNettyCapability.cs
index 8accfa8..ad159af 100644
--- a/src/OpenNetty/OpenNettyCapability.cs
+++ b/src/OpenNetty/OpenNettyCapability.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents a capability supported by an OpenNetty endpoint or device.
diff --git a/src/OpenNetty/OpenNettyCategories.cs b/src/OpenNetty/OpenNettyCategories.cs
index ee92ead..6f30194 100644
--- a/src/OpenNetty/OpenNettyCategories.cs
+++ b/src/OpenNetty/OpenNettyCategories.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty categories, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyCategory.cs b/src/OpenNetty/OpenNettyCategory.cs
index 8f3ae4d..5948108 100644
--- a/src/OpenNetty/OpenNettyCategory.cs
+++ b/src/OpenNetty/OpenNettyCategory.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Text;
 using static OpenNetty.OpenNettyConstants;
diff --git a/src/OpenNetty/OpenNettyCommand.cs b/src/OpenNetty/OpenNettyCommand.cs
index 752db18..faebbbb 100644
--- a/src/OpenNetty/OpenNettyCommand.cs
+++ b/src/OpenNetty/OpenNettyCommand.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Text;
 using static OpenNetty.OpenNettyConstants;
diff --git a/src/OpenNetty/OpenNettyCommands.cs b/src/OpenNetty/OpenNettyCommands.cs
index 357a49e..e2e0500 100644
--- a/src/OpenNetty/OpenNettyCommands.cs
+++ b/src/OpenNetty/OpenNettyCommands.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty commands, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyConfiguration.cs b/src/OpenNetty/OpenNettyConfiguration.cs
index 579299c..872bd36 100644
--- a/src/OpenNetty/OpenNettyConfiguration.cs
+++ b/src/OpenNetty/OpenNettyConfiguration.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using Microsoft.Extensions.Options;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyConnection.cs b/src/OpenNetty/OpenNettyConnection.cs
index 1290a1e..8f1720d 100644
--- a/src/OpenNetty/OpenNettyConnection.cs
+++ b/src/OpenNetty/OpenNettyConnection.cs
@@ -1,4 +1,10 @@
-using System.IO.Ports;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.IO.Ports;
 using System.Net;
 using System.Net.Sockets;
 
diff --git a/src/OpenNetty/OpenNettyConnectionType.cs b/src/OpenNetty/OpenNettyConnectionType.cs
index 810048c..319ba32 100644
--- a/src/OpenNetty/OpenNettyConnectionType.cs
+++ b/src/OpenNetty/OpenNettyConnectionType.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents the type of an OpenNetty connection.
diff --git a/src/OpenNetty/OpenNettyConstants.cs b/src/OpenNetty/OpenNettyConstants.cs
index c477d01..7fd31ec 100644
--- a/src/OpenNetty/OpenNettyConstants.cs
+++ b/src/OpenNetty/OpenNettyConstants.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty constants.
diff --git a/src/OpenNetty/OpenNettyController.cs b/src/OpenNetty/OpenNettyController.cs
index 25fc7b6..cfb75cb 100644
--- a/src/OpenNetty/OpenNettyController.cs
+++ b/src/OpenNetty/OpenNettyController.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Globalization;
 using System.Reactive.Linq;
 
diff --git a/src/OpenNetty/OpenNettyCoordinator.cs b/src/OpenNetty/OpenNettyCoordinator.cs
index 7fb629f..ace9c2c 100644
--- a/src/OpenNetty/OpenNettyCoordinator.cs
+++ b/src/OpenNetty/OpenNettyCoordinator.cs
@@ -1,4 +1,10 @@
-using System.Globalization;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Globalization;
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using static OpenNetty.OpenNettyEvents;
diff --git a/src/OpenNetty/OpenNettyDevice.cs b/src/OpenNetty/OpenNettyDevice.cs
index 8ce57ea..ba0a6b8 100644
--- a/src/OpenNetty/OpenNettyDevice.cs
+++ b/src/OpenNetty/OpenNettyDevice.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 
 namespace OpenNetty;
 
diff --git a/src/OpenNetty/OpenNettyDeviceDefinition.cs b/src/OpenNetty/OpenNettyDeviceDefinition.cs
index 6eef59f..fcfbba2 100644
--- a/src/OpenNetty/OpenNettyDeviceDefinition.cs
+++ b/src/OpenNetty/OpenNettyDeviceDefinition.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Reactive;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyDevices.cs b/src/OpenNetty/OpenNettyDevices.cs
index 3621b97..82c6a7e 100644
--- a/src/OpenNetty/OpenNettyDevices.cs
+++ b/src/OpenNetty/OpenNettyDevices.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Reflection;
 using System.Xml.Linq;
 
diff --git a/src/OpenNetty/OpenNettyDimension.cs b/src/OpenNetty/OpenNettyDimension.cs
index 1ac0965..d68b56b 100644
--- a/src/OpenNetty/OpenNettyDimension.cs
+++ b/src/OpenNetty/OpenNettyDimension.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Text;
 using static OpenNetty.OpenNettyConstants;
diff --git a/src/OpenNetty/OpenNettyDimensions.cs b/src/OpenNetty/OpenNettyDimensions.cs
index dbaf8ea..9671671 100644
--- a/src/OpenNetty/OpenNettyDimensions.cs
+++ b/src/OpenNetty/OpenNettyDimensions.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty dimensions, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyEndpoint.cs b/src/OpenNetty/OpenNettyEndpoint.cs
index c1d411e..a00e98c 100644
--- a/src/OpenNetty/OpenNettyEndpoint.cs
+++ b/src/OpenNetty/OpenNettyEndpoint.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyErrorCode.cs b/src/OpenNetty/OpenNettyErrorCode.cs
index f0fb2b6..077bba4 100644
--- a/src/OpenNetty/OpenNettyErrorCode.cs
+++ b/src/OpenNetty/OpenNettyErrorCode.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents an OpenNetty error code.
diff --git a/src/OpenNetty/OpenNettyEvents.cs b/src/OpenNetty/OpenNettyEvents.cs
index f98cf10..17b5152 100644
--- a/src/OpenNetty/OpenNettyEvents.cs
+++ b/src/OpenNetty/OpenNettyEvents.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using System.Reactive.Concurrency;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;
diff --git a/src/OpenNetty/OpenNettyException.cs b/src/OpenNetty/OpenNettyException.cs
index a02f2ec..b1a5bc9 100644
--- a/src/OpenNetty/OpenNettyException.cs
+++ b/src/OpenNetty/OpenNettyException.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents an OpenNetty exception.
diff --git a/src/OpenNetty/OpenNettyExtensions.cs b/src/OpenNetty/OpenNettyExtensions.cs
index 903f479..6ff66c1 100644
--- a/src/OpenNetty/OpenNettyExtensions.cs
+++ b/src/OpenNetty/OpenNettyExtensions.cs
@@ -1,4 +1,10 @@
-using Microsoft.Extensions.DependencyInjection.Extensions;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Options;
 
 namespace Microsoft.Extensions.DependencyInjection;
diff --git a/src/OpenNetty/OpenNettyField.cs b/src/OpenNetty/OpenNettyField.cs
index 1efb4bb..84531ed 100644
--- a/src/OpenNetty/OpenNettyField.cs
+++ b/src/OpenNetty/OpenNettyField.cs
@@ -1,4 +1,10 @@
-using System.Buffers;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Buffers;
 using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Text;
diff --git a/src/OpenNetty/OpenNettyFrame.cs b/src/OpenNetty/OpenNettyFrame.cs
index da906ea..da06607 100644
--- a/src/OpenNetty/OpenNettyFrame.cs
+++ b/src/OpenNetty/OpenNettyFrame.cs
@@ -1,4 +1,10 @@
-using System.Buffers;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Buffers;
 using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Text;
diff --git a/src/OpenNetty/OpenNettyFrames.cs b/src/OpenNetty/OpenNettyFrames.cs
index e0dbb77..127e36a 100644
--- a/src/OpenNetty/OpenNettyFrames.cs
+++ b/src/OpenNetty/OpenNettyFrames.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenWebNet frames, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyGateway.cs b/src/OpenNetty/OpenNettyGateway.cs
index 526f50d..6acd66a 100644
--- a/src/OpenNetty/OpenNettyGateway.cs
+++ b/src/OpenNetty/OpenNettyGateway.cs
@@ -1,4 +1,10 @@
-using System.IO.Ports;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.IO.Ports;
 using System.Net;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyGatewayOptions.cs b/src/OpenNetty/OpenNettyGatewayOptions.cs
index d23e832..9f1eb66 100644
--- a/src/OpenNetty/OpenNettyGatewayOptions.cs
+++ b/src/OpenNetty/OpenNettyGatewayOptions.cs
@@ -1,4 +1,10 @@
-using Polly;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using Polly;
 using Polly.Retry;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyHelpers.cs b/src/OpenNetty/OpenNettyHelpers.cs
index 1aaf50c..dd9fa5d 100644
--- a/src/OpenNetty/OpenNettyHelpers.cs
+++ b/src/OpenNetty/OpenNettyHelpers.cs
@@ -1,4 +1,10 @@
-using System.Collections.Concurrent;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Concurrent;
 
 namespace OpenNetty;
 
diff --git a/src/OpenNetty/OpenNettyHostedService.cs b/src/OpenNetty/OpenNettyHostedService.cs
index 6e874b2..9414fa2 100644
--- a/src/OpenNetty/OpenNettyHostedService.cs
+++ b/src/OpenNetty/OpenNettyHostedService.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using System.Threading.Channels;
diff --git a/src/OpenNetty/OpenNettyIdentity.cs b/src/OpenNetty/OpenNettyIdentity.cs
index 0f00be1..e706c97 100644
--- a/src/OpenNetty/OpenNettyIdentity.cs
+++ b/src/OpenNetty/OpenNettyIdentity.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents an OpenNetty identity that uniquely
diff --git a/src/OpenNetty/OpenNettyLogger.cs b/src/OpenNetty/OpenNettyLogger.cs
index 8d3a002..a85f254 100644
--- a/src/OpenNetty/OpenNettyLogger.cs
+++ b/src/OpenNetty/OpenNettyLogger.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using Microsoft.Extensions.Logging;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyManager.cs b/src/OpenNetty/OpenNettyManager.cs
index 605d498..c78724b 100644
--- a/src/OpenNetty/OpenNettyManager.cs
+++ b/src/OpenNetty/OpenNettyManager.cs
@@ -1,4 +1,10 @@
-using System.Runtime.CompilerServices;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Runtime.CompilerServices;
 using Microsoft.Extensions.Options;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyMedia.cs b/src/OpenNetty/OpenNettyMedia.cs
index 97a0974..739b256 100644
--- a/src/OpenNetty/OpenNettyMedia.cs
+++ b/src/OpenNetty/OpenNettyMedia.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty transmission media, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyMessage.cs b/src/OpenNetty/OpenNettyMessage.cs
index 052925d..ca3c57e 100644
--- a/src/OpenNetty/OpenNettyMessage.cs
+++ b/src/OpenNetty/OpenNettyMessage.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Globalization;
 
diff --git a/src/OpenNetty/OpenNettyMessageType.cs b/src/OpenNetty/OpenNettyMessageType.cs
index c95eea8..1872848 100644
--- a/src/OpenNetty/OpenNettyMessageType.cs
+++ b/src/OpenNetty/OpenNettyMessageType.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty message types, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyMode.cs b/src/OpenNetty/OpenNettyMode.cs
index 183ea37..767f424 100644
--- a/src/OpenNetty/OpenNettyMode.cs
+++ b/src/OpenNetty/OpenNettyMode.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty transmission modes, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyModels.cs b/src/OpenNetty/OpenNettyModels.cs
index df58864..c019486 100644
--- a/src/OpenNetty/OpenNettyModels.cs
+++ b/src/OpenNetty/OpenNettyModels.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Globalization;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyNotification.cs b/src/OpenNetty/OpenNettyNotification.cs
index 7440dee..35a5ac7 100644
--- a/src/OpenNetty/OpenNettyNotification.cs
+++ b/src/OpenNetty/OpenNettyNotification.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents an abstract OpenNetty notification.
diff --git a/src/OpenNetty/OpenNettyNotifications.cs b/src/OpenNetty/OpenNettyNotifications.cs
index 968ac59..ad340e2 100644
--- a/src/OpenNetty/OpenNettyNotifications.cs
+++ b/src/OpenNetty/OpenNettyNotifications.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common notifications supported by the OpenNetty stack.
diff --git a/src/OpenNetty/OpenNettyOptions.cs b/src/OpenNetty/OpenNettyOptions.cs
index cb59346..03c1e00 100644
--- a/src/OpenNetty/OpenNettyOptions.cs
+++ b/src/OpenNetty/OpenNettyOptions.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Provides various settings needed to configure the OpenNetty services.
diff --git a/src/OpenNetty/OpenNettyParameter.cs b/src/OpenNetty/OpenNettyParameter.cs
index 6bd1fb2..079172a 100644
--- a/src/OpenNetty/OpenNettyParameter.cs
+++ b/src/OpenNetty/OpenNettyParameter.cs
@@ -1,4 +1,10 @@
-using System.Diagnostics;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Diagnostics;
 using System.Text;
 
 namespace OpenNetty;
diff --git a/src/OpenNetty/OpenNettyPipe.cs b/src/OpenNetty/OpenNettyPipe.cs
index daae6e7..f2f5bef 100644
--- a/src/OpenNetty/OpenNettyPipe.cs
+++ b/src/OpenNetty/OpenNettyPipe.cs
@@ -1,4 +1,10 @@
-using System.Buffers;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Buffers;
 using System.Diagnostics.CodeAnalysis;
 using System.IO.Pipelines;
 using System.Runtime.CompilerServices;
diff --git a/src/OpenNetty/OpenNettyPipeline.cs b/src/OpenNetty/OpenNettyPipeline.cs
index c84bb99..65619b8 100644
--- a/src/OpenNetty/OpenNettyPipeline.cs
+++ b/src/OpenNetty/OpenNettyPipeline.cs
@@ -1,4 +1,10 @@
-using System.ComponentModel;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.ComponentModel;
 using System.Reactive.Concurrency;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;
diff --git a/src/OpenNetty/OpenNettyProtocol.cs b/src/OpenNetty/OpenNettyProtocol.cs
index 8cb9d6f..c08c0a1 100644
--- a/src/OpenNetty/OpenNettyProtocol.cs
+++ b/src/OpenNetty/OpenNettyProtocol.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty protocols, as defined by the Nitoo and MyHome specifications.
diff --git a/src/OpenNetty/OpenNettyScenario.cs b/src/OpenNetty/OpenNettyScenario.cs
index fedc060..9767c69 100644
--- a/src/OpenNetty/OpenNettyScenario.cs
+++ b/src/OpenNetty/OpenNettyScenario.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents an OpenNetty scenario (Nitoo only).
diff --git a/src/OpenNetty/OpenNettyService.cs b/src/OpenNetty/OpenNettyService.cs
index 7136286..7b3cc2d 100644
--- a/src/OpenNetty/OpenNettyService.cs
+++ b/src/OpenNetty/OpenNettyService.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 using System.Reactive.Linq;
 using System.Runtime.CompilerServices;
 using Microsoft.Extensions.Options;
diff --git a/src/OpenNetty/OpenNettySession.cs b/src/OpenNetty/OpenNettySession.cs
index 522f9a0..549e28a 100644
--- a/src/OpenNetty/OpenNettySession.cs
+++ b/src/OpenNetty/OpenNettySession.cs
@@ -1,4 +1,10 @@
-using System.Globalization;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Globalization;
 using System.Reactive.Concurrency;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;
diff --git a/src/OpenNetty/OpenNettySessionType.cs b/src/OpenNetty/OpenNettySessionType.cs
index 6162578..c5b6b98 100644
--- a/src/OpenNetty/OpenNettySessionType.cs
+++ b/src/OpenNetty/OpenNettySessionType.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents the type of an OpenNetty session.
diff --git a/src/OpenNetty/OpenNettySetting.cs b/src/OpenNetty/OpenNettySetting.cs
index e5dd0b0..c1f4834 100644
--- a/src/OpenNetty/OpenNettySetting.cs
+++ b/src/OpenNetty/OpenNettySetting.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Represents a setting attached to an OpenNetty endpoint, device or unit.
diff --git a/src/OpenNetty/OpenNettySettings.cs b/src/OpenNetty/OpenNettySettings.cs
index f2921e9..861b38c 100644
--- a/src/OpenNetty/OpenNettySettings.cs
+++ b/src/OpenNetty/OpenNettySettings.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common settings supported by OpenNetty.
diff --git a/src/OpenNetty/OpenNettyTransaction.cs b/src/OpenNetty/OpenNettyTransaction.cs
index 7fa2385..dbf00bd 100644
--- a/src/OpenNetty/OpenNettyTransaction.cs
+++ b/src/OpenNetty/OpenNettyTransaction.cs
@@ -1,4 +1,10 @@
-using System.Diagnostics;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Diagnostics;
 
 namespace OpenNetty;
 
diff --git a/src/OpenNetty/OpenNettyTransmissionOptions.cs b/src/OpenNetty/OpenNettyTransmissionOptions.cs
index db0ec7e..e752ce2 100644
--- a/src/OpenNetty/OpenNettyTransmissionOptions.cs
+++ b/src/OpenNetty/OpenNettyTransmissionOptions.cs
@@ -1,4 +1,10 @@
-namespace OpenNetty;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+namespace OpenNetty;
 
 /// <summary>
 /// Exposes common OpenNetty transmission options that can
diff --git a/src/OpenNetty/OpenNettyUnit.cs b/src/OpenNetty/OpenNettyUnit.cs
index 12ad90a..b31d033 100644
--- a/src/OpenNetty/OpenNettyUnit.cs
+++ b/src/OpenNetty/OpenNettyUnit.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 
 namespace OpenNetty;
 
diff --git a/src/OpenNetty/OpenNettyUnitDefinition.cs b/src/OpenNetty/OpenNettyUnitDefinition.cs
index d5553c3..bc90285 100644
--- a/src/OpenNetty/OpenNettyUnitDefinition.cs
+++ b/src/OpenNetty/OpenNettyUnitDefinition.cs
@@ -1,4 +1,10 @@
-using System.Collections.Immutable;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Collections.Immutable;
 
 namespace OpenNetty;
 
diff --git a/src/OpenNetty/OpenNettyWorker.cs b/src/OpenNetty/OpenNettyWorker.cs
index d6e0715..20d8072 100644
--- a/src/OpenNetty/OpenNettyWorker.cs
+++ b/src/OpenNetty/OpenNettyWorker.cs
@@ -1,4 +1,10 @@
-using System.Diagnostics;
+/*
+ * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * See https://github.com/opennetty/opennetty-core for more information concerning
+ * the license and the contributors participating to this project.
+ */
+
+using System.Diagnostics;
 using System.Runtime.CompilerServices;
 using System.Threading.Channels;
 using Polly;