Change RazorPage default page

DefaultPageRouteModelConvention.cs

        public class DefaultPageRouteModelConvention : IPageRouteModelConvention
        {
            public void Apply(PageRouteModel model)
            {
                if (model.RelativePath == "/Pages/Index.cshtml")
                {
                    var currentHomePage = model.Selectors.Single(s => s.AttributeRouteModel.Template == string.Empty);
                    model.Selectors.Remove(currentHomePage);
                }

                if (model.RelativePath == "/Pages/InputType.cshtml")
                {
                    model.Selectors.Add(new SelectorModel()
                                        {
                                            AttributeRouteModel = new AttributeRouteModel
                                                                  {
                                                                      Template = string.Empty
                                                                  }
                                        });
                }
            }
        }

Startup.cs

 services.AddMvc()
                    .AddRazorPagesOptions(options =>
                                          {
                                              options.Conventions.Add(new DefaultPageRouteModelConvention());
                                          })
                    .SetCompatibilityVersion(CompatibilityVersion.Version_2_2);