exclude main.css from bundle.

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Blazor/MyProjectNameBundleContributor.cs

@@ -6,12 +6,11 @@ namespace MyCompanyName.MyProjectName.Blazor
     {
         public void AddScripts(BundleContext context)
         {
-
         }
 
         public void AddStyles(BundleContext context)
         {
-            context.Add("main.css");
+            context.Add("main.css", true);
         }
     }
-}
+}