Added NLogLoggerFactory

src/NLog.Extensions.Logging/NLogLoggerFactory.cs

@@ -0,0 +1,67 @@
+using System;
+using Microsoft.Extensions.Logging;
+using NLog.Common;
+
+namespace NLog.Extensions.Logging
+{
+    /// <summary>
+    /// Creating DI loggers for Microsoft.Extensions.Logging and NLog
+    /// </summary>
+    public class NLogLoggerFactory : ILoggerFactory
+    {
+        private NLogLoggerProvider _provider;
+
+        /// <summary>
+        /// New factory with default options
+        /// </summary>
+        public NLogLoggerFactory()
+        {
+            _provider = new NLogLoggerProvider();
+        }
+
+        /// <summary>
+        /// New factory with options. 
+        /// </summary>
+        /// <param name="options"></param>
+        public NLogLoggerFactory(NLogProviderOptions options)
+        {
+            _provider = new NLogLoggerProvider(options);
+        }
+
+
+        #region Implementation of IDisposable
+
+        /// <summary>
+        /// Dispose
+        /// </summary>
+        public void Dispose()
+        {
+            LogManager.Flush();
+        }
+
+        #endregion
+
+        #region Implementation of ILoggerFactory
+
+        /// <summary>
+        /// Creates a new <see cref="T:Microsoft.Extensions.Logging.ILogger" /> instance.
+        /// </summary>
+        /// <param name="categoryName">The logger name for messages produced by the logger.</param>
+        /// <returns>The <see cref="T:Microsoft.Extensions.Logging.ILogger" />.</returns>
+        public Microsoft.Extensions.Logging.ILogger CreateLogger(string categoryName)
+        {
+            return _provider.CreateLogger(categoryName);
+        }
+
+        /// <summary>
+        /// Do nothing
+        /// </summary>
+        /// <param name="provider">The <see cref="T:Microsoft.Extensions.Logging.ILoggerProvider" />.</param>
+        public void AddProvider(ILoggerProvider provider)
+        {
+            InternalLogger.Debug("AddProvider will be ignored");
+        }
+
+        #endregion
+    }
+}

src/NLog.Extensions.Logging/NLogLoggerProvider.cs

@@ -11,14 +11,14 @@ public class NLogLoggerProvider : Microsoft.Extensions.Logging.ILoggerProvider
         public NLogProviderOptions Options { get; set; }
 
         /// <summary>
-        /// <see cref="NLogLoggerProvider"/> with default options.
+        /// New provider with default options, see <see cref="Options"/>
         /// </summary>
         public NLogLoggerProvider() 
         {
         }
 
         /// <summary>
-        /// <see cref="NLogLoggerProvider"/> with default options.
+        /// New provider with options
         /// </summary>
         /// <param name="options"></param>
         public NLogLoggerProvider(NLogProviderOptions options)