اگ توی Asp.net Core میگین باید کنترل پیشفرض روی home قرار بدین

 app.UseEndpoints(endpoints =>
            {

             

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

            });

این کد رو توی فایل startup.cs متد Configure بزارین
 

  public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                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.UseAuthentication();
            app.UseRouting();

            app.UseAuthorization();
            app.UseEndpoints(endpoints =>
            {



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

            });