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var builder = WebApplication.CreateBuilder(args); // Add service
container.builder.Services.AddRazorPages();
builder.Services.AddControllersWithViews(); 
var app = builder.Build();

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var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.Use(async (context, next) =>
{
    // Do work that can write to the Response.
    await next.Invoke();
    // Do logging or other work that doesn't write to the Response.
});

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AddScoped<ITCService, TCService>();

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 services.AddTransient<ITCService, TCService>();

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services.AddSingleton<ITCService, TCService>();

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public class HomeController: Controller
 {
 ITCService _TCService;
 public HomeController(ITCService _TCService)
 {
    _TCService = TCService;
 }
 }

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public void ConfigureServices(IServiceCollection services)
 {
....
.....
 services.AddTransient<ITCService, TCService>();
 ......
......
 }

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public interface ITCService
 {
    string SaysTC();
 }
 
 public class TCService: ITCService
 {
 public string SaysTC()
 {
 return “TC";

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public class Test1Model : PageModel
 {
 [BindProperty]
 public string Name { get; set; }
 }

anjankant

@page
 <h1> Welcome!</h1>
 <h2> This is my first sample Razor Page :) </h2>