Adding a condition to Content CopyToPublishDirectory to validate that the file exists before trying to copy it to output, to keep the same functionality as it existed in PJ. In MSBuild world, without this condition, CopyToPublishDirectory will fail.

TestAssets/TestProjects/WebAppWithMissingFileInPublishOptions/Controllers/HomeController.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+
+namespace WebApplication.Controllers
+{
+    public class HomeController : Controller
+    {
+        public IActionResult Index()
+        {
+            return View();
+        }
+
+        public IActionResult About()
+        {
+            ViewData["Message"] = "Your application description page.";
+
+            return View();
+        }
+
+        public IActionResult Contact()
+        {
+            ViewData["Message"] = "Your contact page.";
+
+            return View();
+        }
+
+        public IActionResult Error()
+        {
+            return View();
+        }
+    }
+}