SF_10.0, SF_10.1, SF_10.2, SF_11.0, SF_11.1, SF_11.2, SF_12.0, SF_12.1, SF_12.2, SF_13.0, SF_13.1, SF_13.2, SF_13.3, SF_14.0, SF_14.1, SF_14.2, SF_14.3 - https://docs.sitefinity.com/for-developers-query-pages

QueryPages_FindPageByTitle_FluentAPI.cs

using System.Linq;
using Telerik.Sitefinity;
using Telerik.Sitefinity.Pages.Model;

namespace SitefinityWebApp
{
    public class QueryPages_FindPageByTitle_FluentAPI
    {
        public PageData FindPageByTitleFluentAPI(string pageTitle)
        {
            PageData pageData = null;

            var count = 0;
            App.WorkWith().Pages().Where(pN => (pN.Page != null && pN.Page.Title == pageTitle)).Count(out count);

            if (count != 0)
            {
                pageData = App.WorkWith().Pages().Where(pN => (pN.Page != null && pN.Page.Title == pageTitle)).Get().First().Page;
            }

            return pageData;
        }
    }
}