Get summary block from each API method

GetDocumentation.cs

/// <summary>
/// Read the Summary block from each API method, grab the entire XML fragment as we'll use a series of 
/// Extension methods on APIExplorer to parse the XML for output later.
/// </summary>
public virtual string GetDocumentation(HttpActionDescriptor actionDescriptor)
{
    var memberNode = GetMemberNode(actionDescriptor);

    if (memberNode != null)
    {
	var summaryNode = memberNode.SelectSingleNode("summary");
	if (summaryNode != null)
	{
	    return summaryNode.OuterXml;
	}
    }

    return "No Documentation Found.";
}