SF_15.2 - https://www.progress.com/documentation/sitefinity-cms/for-developers-create-pages-with-the-native-api

CreatePageNativeAPISnippet3.cs

using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using Telerik.Sitefinity.Abstractions;
using Telerik.Sitefinity.Modules.Pages;
using Telerik.Sitefinity.Pages.Model;
using Telerik.Sitefinity.Services;
using Telerik.Sitefinity.Workflow;

namespace SitefinityWebApp
{
    public partial class PagesSnippets 
    {
        public static void CreatePageNativeAPI(string pageName, bool isHomePage, Guid parentPageNodeId)
        {
            // If you want to perform an action on a specific site in a multisite deployment,
            // you can use the CurrentSite property, accessible from SystemManager.CurrentContext.MultisiteContext:
            var currentContext = SystemManager.CurrentContext;
            var multisiteContext = currentContext.MultisiteContext;
            var currentSite = multisiteContext.CurrentSite;
            using (new SiteRegion(currentSite))
            {
                PageManager manager = PageManager.GetManager();

                if (parentPageNodeId == Guid.Empty)
                {
                    parentPageNodeId = SiteInitializer.CurrentFrontendRootNodeId;
                }

                PageNode parent = manager.GetPageNode(parentPageNodeId);
                var pageId = Guid.NewGuid();
                //Create the page node
                PageNode pageNode = manager.CreatePage(parent, pageId, NodeType.Standard);
                //Create the PageData and set its properties
                PageData pageData = pageNode.GetPageData();
                pageData.HtmlTitle = pageName;
                //Set Page properties
                pageNode.Name = pageName;
                pageNode.Description = pageName;
                pageNode.Title = pageName;
                pageNode.ShowInNavigation = true;
                pageNode.ApprovalWorkflowState = "Published";

                if (isHomePage)
                {
                    SystemManager.CurrentContext.CurrentSite.SetHomePage(pageId);
                }
                //Commit the page to DB
                manager.SaveChanges();
                //Publish the page via workflow
                var bag = new Dictionary<string, string>();
                bag.Add("ContentType", typeof(PageNode).FullName);
                WorkflowManager.MessageWorkflow(pageNode.Id, typeof(PageNode), null, "Publish", false, bag);
            }
        }
    }
}