Auth Recipe — C# (.NET) — REFERENCE ONLY

Microsoft Identity Web (ASP.NET Core)

NuGet Packages

Program.cs (additions)

Add these lines — do NOT replace the existing file:

using Microsoft.Identity.Web;

// Add after builder creation
builder.Services.AddMicrosoftIdentityWebApiAuthentication(builder.Configuration);
builder.Services.AddAuthorization();

// Add after app build
app.UseAuthentication();
app.UseAuthorization();

// Protected endpoint
app.MapGet("/api/me", [Authorize] (HttpContext ctx) =>
{
    var name = ctx.User.FindFirst("name")?.Value;
    return Results.Ok(new { name });
});

appsettings.json

{
  "AzureAd": {
    "Instance": "https://login.microsoftonline.com/",