There is no registered service of type error, when I have a registered type

Question

I followed a tutorial for saving data in a Blazor App. I have an ApplicationDbContext.cs file:

using Microsoft.EntityFrameworkCore;
using BlazorApp1.Shared.Models;
using System;

namespace BlazorApp1.Shared.Data
{
    public class ApplicationDbContext : DbContext
    {
        public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options)
        {
        }

        public DbSet<SurveyModel> surveyModel { get; set; }
    }
}

And I have registered it as a service in startup.cs:

public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<ApplicationDbContext>(options =>
                options.UseSqlServer(
                    Configuration.GetConnectionString("DefaultConnection")));

I have injected it into my Survey.razor page with @inject BlazorApp1.Shared.Data.ApplicationDbContext _context

I am getting the error:

Unhandled exception rendering component: Cannot provide a value for property '_context' on type 'BlazorApp1.Client.Pages.Survey'. There is no registered service of type 'BlazorApp1.Shared.Data.ApplicationDbContext'.