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-find-list-items

FindListItems_GetListItemByTitleNativeAPI.cs

using System.Linq;
using Telerik.Sitefinity.Modules.Lists;
using Telerik.Sitefinity.Lists.Model;
using Telerik.Sitefinity.GenericContent.Model;

namespace SitefinityWebApp
{
    public class FindListItems_GetListItemByTitleNativeAPI
    {
        public ListItem GetListItemByTitleNativeAPI(string title)
        {
            ListsManager listsManager = ListsManager.GetManager();
            ListItem listItem = listsManager.GetListItems().Where(i => (i.Title == title && i.Status == ContentLifecycleStatus.Live))
                .FirstOrDefault();
            return listItem;
        }
    }
}