dev only mode

Attributes/DevelopmentOnlyAttribute.cs

@@ -0,0 +1,21 @@
+using System;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Filters;
+using Microsoft.Extensions.DependencyInjection;
+
+public class DevelopmentOnlyAttribute : Attribute, IResourceFilter
+{
+    public void OnResourceExecuting(ResourceExecutingContext context)
+    {
+        var env = context.HttpContext.RequestServices.GetService<IHostingEnvironment>();
+        if (!env.IsDevelopment())
+        {
+            context.Result = new NotFoundResult();
+        }
+    }
+
+    public void OnResourceExecuted(ResourceExecutedContext context)
+    {
+    }
+}