add info about new $imclassname and %module(imclassname="..")

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@8024 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Doc/Manual/CSharp.html

@@ -316,6 +316,26 @@ This feature is useful for some obscure cases where SWIG might get the <tt>virtu
 </p>
 </li>
 
+<li>
+<a name="csharp_module_directive">
+<p>
+The name of the intermediary class can be changed from its default, that is, the module name with PINVOKE appended after it. 
+The module directive attribute <tt>imclassname</tt> is used to achieve this:
+</p>
+
+<div class="code">
+<pre>
+%module (imclassname="name") modulename
+</pre>
+</div>
+
+<p>
+If <tt>name</tt> is the same as <tt>modulename</tt> then the module class name gets changed
+from <tt>modulename</tt> to <tt>modulenameModule</tt>.
+</p>
+</li>
+
+
 </ul>
 
 <p>
@@ -325,6 +345,12 @@ The special variable will get translated into the value specified by the <tt>-dl
 if specified, otherwise it is equivalent to the <b>$module</b> special variable.
 </p>
 
+<p>
+<b><tt>$imclassname</tt></b><br>
+This special variable expands to the intermediary class name. For C# this is usually the same as '$modulePINVOKE' ('$moduleJNI' for Java),
+unless the imclassname attribute is specified in the <a href="CSharp.html#csharp_module_directive">%module directive</a>.
+</p>
+
 <p>
 The directory <tt>Examples/csharp</tt> has a number of simple examples. 
 Visual Studio .NET 2003 solution and project files are available for compiling with the Microsoft .NET C# compiler on Windows.