.NET 6 MVC enabling razor runtime compilation breaks program.cs

Question

I followed the simple steps at https://learn.microsoft.com/en-us/aspnet/core/mvc/views/view-compilation?view=aspnetcore-6.0&tabs=visual-studio to enable runtime compilation of my cshtml views.

However as soon as i add ".AddRazorRuntimeCompilation()" to the builder:

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddRazorPages()
    .AddRazorRuntimeCompilation();

This will result in an error when running the project:

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

System.ArgumentNullException
  HResult=0x80004003
  Message=Value cannot be null. (Parameter 'source')
  Source=System.Linq
  StackTrace:
   at System.Linq.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
   at System.Linq.Enumerable.OfType[TResult](IEnumerable source)
   at Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionDescriptorProvider..ctor(IEnumerable`1 pageRouteModelProviders, IOptions`1 mvcOptionsAccessor, IOptions`1 pagesOptionsAccessor)
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Span`1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitIEnumerable(IEnumerableCallSite enumerableCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at Microsoft.AspNetCore.Builder.ControllerEndpointRouteBuilderExtensions.GetOrCreateDataSource(IEndpointRouteBuilder endpoints)
   at Microsoft.AspNetCore.Builder.ControllerEndpointRouteBuilderExtensions.MapControllerRoute(IEndpointRouteBuilder endpoints, String name, String pattern, Object defaults, Object constraints, Object dataTokens)
   at Program.<Main>$(String[] args) in C:\---\---\---\Cshtml test\Cshtml test\Program.cs:line 25

EDIT:

Here is the code:

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews()
    .AddRazorRuntimeCompilation();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

app.Run();

It's just a completely new unmodified project of the type "ASP.NET Core Web App (Model-View-Controller) where i add the Nuget package as described in the microsoft documentation. — Kaare Mai
– Kaare Mai, Commented Apr 3, 2022 at 9:56
I just created a new .NET 6 project with the "ASP.NET Core Web App" template. Installed Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation version 6.0.3 and could start the project fine. Could you try re-creating the project? — MaartenDev
– MaartenDev, Commented Apr 3, 2022 at 17:43
Update dotnet SDK to 6.0.201 github.com/dotnet/aspnetcore/issues/40609 — balazska
– balazska, Commented Apr 4, 2022 at 12:59
Temporary solution for this issue is to add this line to the builder: builder.Services.AddRazorPages(); — robocik
– robocik, Commented Jul 19, 2022 at 12:14

moken · Accepted Answer · 2023-05-19 12:52:18Z

-2

builder.Services.AddControllersWithViews().AddRazorRuntimeCompilation();
builder.Services.AddMvc();

Adding addmvc fixed it

edited May 19, 2023 at 12:52

moken

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answered May 16, 2023 at 9:31

Özge Arslan Türkmen

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2 Comments

Zimano Over a year ago

Perhaps you could elaborate a bit more on why builder.Services.AddMvc(); worked.

Community Over a year ago

Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.

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