add razor runtime compilation for development environment

sample/MongoIdentitySample.Mvc/Startup.cs

@@ -15,8 +15,10 @@ namespace MongoIdentitySample.Mvc
 {
     public class Startup
     {
+        private IWebHostEnvironment _env;
         public Startup(IWebHostEnvironment env)
         {
+            _env = env;
             var builder = new ConfigurationBuilder()
                 .SetBasePath(env.ContentRootPath)
                 .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
@@ -44,6 +46,16 @@ namespace MongoIdentitySample.Mvc
                     .AddSignInManager()
                     .AddDefaultTokenProviders();
 
+
+            var builder = services.AddRazorPages();
+            
+            #if DEBUG
+                if(_env.IsDevelopment())
+                {
+                    builder.AddRazorRuntimeCompilation();
+                }
+            #endif
+
             services.AddMvc();
 
             services.AddApplicationInsightsTelemetry();

sample/MongoIdentitySample.Mvc/Views/Shared/_Layout.cshtml

@@ -31,7 +31,7 @@
             @RenderBody()
             <hr />
             <footer>
-                <p>&copy; 2016 - IdentitySample</p>
+                <p>&copy; 2020 - IdentitySample</p>
             </footer>
         </div>