orchardcms - Orchard alternates based on Tag -

I want to make choices for content items based on my tag values.

For example, I want to make an alternate call to do list-projectionpage-tag-specific

searching the net for me a new ShapeDisplayEvents to apply

thus, I have

  public class TagAlternatesFactory: ShapeDisplayEvents {public TagAlternatesFactory () {} public override void display (ShapeDisplayingContext context) {}}   
 the   method displays, I believe I have a contentItem off context.Shape Please check and make an alternate name based on that (assuming it has been added to the TagsPart content item).  
 However, after this what do I do with it? How do I add alternate names? And is it necessary to create a new alternative type? Orchard will look to see the  list-projectionpage-tag-specific ?   
  
 I saw some orchard source took a cue commented Bertrand Direction  
 Here's my implementation:.  
  public class TagAlternatesFactory: ShapeDisplayEvents {public override void display (ShapeDisplayingContext context) {context.ShapeMetadata.OnDisplaying (displayedContext = & gt; {var contentItem = displayedContext.Shape.ContentItem; var contentType = contentItem .ContentType; ContentPart & gt ;; if (parts == null; var parts IEnumerable of & lt as = contentItem.Parts) return; Var tags (part = & gt; part of the tag part) as the tag; if (tag part == null) return; foreach (tag tag var.CurrentTags) {displayContext.ShapeMetadata.Alternates.Add (String.Format ( "{0} __ {1} __ {2} __ {3}", displays Contex. Showpate MetatataT See the update;};}}   
 This is an optional view based on a tag value. So, if you have a project page that you want to apply to a specific style, you can create your own alternative view with just the name  ProjectionPage_tag_special  and at any time you launch Want to use the page, just add it to  special  this Tag.  
  Update  I  displayed the content box. Shapamatadata Type  for the alternative name so that the specific size is overrun (like the list-launch page)