Update documentation [skip ci]

docs/articles/patching.html

@@ -108,6 +108,23 @@ <h2 id="patch-methods">Patch methods</h2>
 </code></pre>
 <p>If you prefer manual patching, you can use any method name or class structure you want. You are responsible to retrieve the MethodInfo for the different patch methods and supply them to the Patch() method by wrapping them into HarmonyMethod objects.</p>
 <p><img src="https://raw.githubusercontent.com/pardeike/Harmony/master/Harmony/Documentation/images/note.png" alt="note"> Patch methods <em>must</em> be static but you can define them public or private. They cannot be dynamic methods but you can write static patch factory methods that return dynamic methods.</p>
+<pre><code class="lang-csharp">[HarmonyPatch(...)]
+class Patch
+{
+	// the return type of factory methods can be either MethodInfo or DynamicMethod
+	[HarmonyPrefix]
+	static MethodInfo PrefixFactory(MethodBase originalMethod)
+	{
+		// return an instance of MethodInfo or an instance of DynamicMethod
+	}
+
+	[HarmonyPostfix]
+	static MethodInfo PostfixFactory(MethodBase originalMethod)
+	{
+		// return an instance of MethodInfo or an instance of DynamicMethod
+	}
+}
+</code></pre>
 <h3 id="method-names">Method names</h3>
 <p>Manual patching knows four main patch types: <strong>Prefix</strong>, <strong>Postfix</strong>, <strong>Transpiler</strong> and <strong>Finalizer</strong>. If you use attributes for patching, you can also use the helper methods: <strong>Prepare</strong>, <strong>TargetMethod</strong>, <strong>TargetMethods</strong> and <strong>Cleanup</strong> as explained below.</p>
 <p>Each of those names has a corresponding attribute starting with [Harmony...]. So instead of calling one of your methods &quot;Prepare&quot;, you can call it anything and decorate it with a <code>[HarmonyPrepare]</code> attribute.</p>

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