added eventlog appender doc

Author: FreeAndNil

src/site/antora/modules/ROOT/nav.adoc

@@ -25,6 +25,7 @@
 **** xref:manual/configuration/bufferingforwardingappender.adoc[]
 **** xref:manual/configuration/coloredconsoleappender.adoc[]
 **** xref:manual/configuration/consoleappender.adoc[]
+**** xref:manual/configuration/eventlogappender.adoc[]
 ** xref:manual/examples.adoc[]
 ** xref:manual/filters.adoc[]
 ** xref:manual/layouts.adoc[]

src/site/antora/modules/ROOT/pages/manual/configuration/eventlogappender.adoc

@@ -0,0 +1,42 @@
+////
+    Licensed to the Apache Software Foundation (ASF) under one or more
+    contributor license agreements.  See the NOTICE file distributed with
+    this work for additional information regarding copyright ownership.
+    The ASF licenses this file to You under the Apache License, Version 2.0
+    (the "License"); you may not use this file except in compliance with
+    the License.  You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+////
+
+[#eventlogappender]
+= EventLogAppender
+
+The following example shows how to configure the EventLogAppender to log to the Application event log on the local machine using the event Source of the AppDomain.FriendlyName. 
+
+[source,xml]
+----
+<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender" >
+  <layout type="log4net.Layout.PatternLayout">
+    <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
+  </layout>
+</appender>
+----
+
+This example shows how to configure the EventLogAppender to use a specific event Source. 
+
+[source,xml]
+----
+<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender" >
+  <applicationName value="MyApp" />
+  <layout type="log4net.Layout.PatternLayout">
+    <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
+  </layout>
+</appender>
+----

src/site/antora/modules/ROOT/pages/manual/configuration/examples.adoc

@@ -25,4 +25,5 @@ These examples are by no means exhaustive configurations for the appenders.
 * xref:manual/configuration/adonetappender.adoc[]
 * xref:manual/configuration/bufferingforwardingappender.adoc[]
 * xref:manual/configuration/coloredconsoleappender.adoc[]
-* xref:manual/configuration/consoleappender.adoc[]
+* xref:manual/configuration/consoleappender.adoc[]
+* xref:manual/configuration/eventlogappender.adoc[]