I recently used Oleg Tkachenko's nice (and old) MultiOutTransform to generate HTML documentation for a little C# project. It was important that the documentation was always updated, so I checked the "XML documentation file" project setting and added a call to MultiOutTransform in the post build event. There is a small, but quite imporant thing missing from the generated output: Return values. To get them in the output, insert the following chunk at line 271 in xmldoc-class.xsl.
<xsl:if test="returns"> <h4 class="dtH4">Returnsh4> <div class="returns"> <xsl:apply-templates select="returns"/> div> xsl:if>