Added factory builder.

src/Device.Net/FactoryBuilder.cs

@@ -0,0 +1,36 @@
+using Microsoft.Extensions.Logging;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+
+namespace Device.Net
+{
+    public class FactoryBuilder : IFactoryBuilder
+    {
+        public ILoggerFactory LoggerFactory { get; }
+        public ReadOnlyCollection<IDeviceFactory> Factories { get; }
+
+        public FactoryBuilder(ILoggerFactory loggerFactory = null)
+        {
+            LoggerFactory = loggerFactory;
+            Factories = new List<IDeviceFactory>().AsReadOnly();
+        }
+
+        public FactoryBuilder(IDeviceFactory deviceFactory, ILoggerFactory loggerFactory = null)
+        {
+            LoggerFactory = loggerFactory;
+            Factories = deviceFactory == null
+                ? new List<IDeviceFactory>().AsReadOnly()
+                : new ReadOnlyCollection<IDeviceFactory>(new IDeviceFactory[] { deviceFactory });
+        }
+
+        public FactoryBuilder(IList<IDeviceFactory> deviceFactories, ILoggerFactory loggerFactory = null)
+        {
+            LoggerFactory = loggerFactory;
+            Factories = deviceFactories == null
+                ? new List<IDeviceFactory>().AsReadOnly()
+                : new ReadOnlyCollection<IDeviceFactory>(deviceFactories);
+        }
+
+        public IDeviceFactory Build() => Factories.Aggregate();
+    }
+}

src/Device.Net/IFactoryBuilder.cs

@@ -0,0 +1,12 @@
+using Microsoft.Extensions.Logging;
+using System.Collections.ObjectModel;
+
+namespace Device.Net
+{
+    public interface IFactoryBuilder
+    {
+        ILoggerFactory LoggerFactory { get; }
+        ReadOnlyCollection<IDeviceFactory> Factories { get; }
+        IDeviceFactory Build();
+    }
+}

src/Hid.Net/Windows/WindowsHidDeviceFactoryExtensions.cs

@@ -18,6 +18,78 @@ public static class WindowsHidDeviceFactoryExtensions
     {
         #region Public Methods
 
+        public static IFactoryBuilder CreateWindowsHidDeviceFactory(
+        this IFactoryBuilder builder,
+        FilterDeviceDefinition filterDeviceDefinition,
+        IHidApiService hidApiService = null,
+        Guid? classGuid = null,
+        ushort? readBufferSize = null,
+        ushort? writeBufferSize = null,
+        GetConnectedDeviceDefinitionsAsync getConnectedDeviceDefinitionsAsync = null,
+        Func<Report, TransferResult> readReportTransform = null,
+        Func<TransferResult, Report> readTransferTransform = null,
+        Func<byte[], byte, byte[]> writeTransferTransform = null,
+        WriteReportTransform writeReportTransform = null)
+        {
+            _ = builder ?? throw new ArgumentNullException(nameof(builder));
+
+            var factories = new List<IDeviceFactory>(builder.Factories)
+            {
+                CreateWindowsHidDeviceFactory
+                (
+                new ReadOnlyCollection<FilterDeviceDefinition>(new List<FilterDeviceDefinition> { filterDeviceDefinition }),
+                builder.LoggerFactory,
+                hidApiService,
+                classGuid,
+                readBufferSize,
+                writeBufferSize,
+                getConnectedDeviceDefinitionsAsync,
+                readReportTransform,
+                readTransferTransform,
+                writeTransferTransform,
+                writeReportTransform
+                )
+            };
+
+            return new FactoryBuilder(factories, builder.LoggerFactory);
+        }
+
+        public static IFactoryBuilder CreateWindowsHidDeviceFactory(
+        this IFactoryBuilder builder,
+        FilterDeviceDefinition[] filterDeviceDefinitions,
+        IHidApiService hidApiService = null,
+        Guid? classGuid = null,
+        ushort? readBufferSize = null,
+        ushort? writeBufferSize = null,
+        GetConnectedDeviceDefinitionsAsync getConnectedDeviceDefinitionsAsync = null,
+        Func<Report, TransferResult> readReportTransform = null,
+        Func<TransferResult, Report> readTransferTransform = null,
+        Func<byte[], byte, byte[]> writeTransferTransform = null,
+        WriteReportTransform writeReportTransform = null)
+        {
+            _ = builder ?? throw new ArgumentNullException(nameof(builder));
+
+            var factories = new List<IDeviceFactory>(builder.Factories)
+            {
+                CreateWindowsHidDeviceFactory
+                (
+                new ReadOnlyCollection<FilterDeviceDefinition>(filterDeviceDefinitions),
+                builder.LoggerFactory,
+                hidApiService,
+                classGuid,
+                readBufferSize,
+                writeBufferSize,
+                getConnectedDeviceDefinitionsAsync,
+                readReportTransform,
+                readTransferTransform,
+                writeTransferTransform,
+                writeReportTransform
+                )
+            };
+
+            return new FactoryBuilder(factories, builder.LoggerFactory);
+        }
+
         /// <summary>
         /// Creates a <see cref="IDeviceFactory"/> for Windows Hid devices
         /// </summary>