An item with the same key has already been added.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
at BPC.Site.SiteHelper.get_Snipets()
at BPC.Site.SiteHelper.ProcessSnipets(String txt)
at BPC.Site.Renderer.ReplaceCodeBlocks(String content)
at BPC.Site.Renderer.Render()