I have a CMSDatalist that I have slightly customized.

I am trying to check the PageAliasPath but the PageManager returns the error: CS0117: 'CMS.Controls.IPageManager' does not contain a definition for 'PageInfo'

Here's the offending code:
Response.Write(this.PageManager.PageAliasPath);

If I try to do this:
Response.Write(this.PageManager.ViewMode);
OR
Response.Write(this.PageManager.SiteName);

I see both but the PageAliasPath isn't in scope? Why? What am I doing wrong?