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1. Using Keyed Services in ASP.NET Core... Using Keyed Services in ASP.NET Core to manage multiple implementations of an interface starting in .NET 8.

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   // option 1: From Keyed Services attribute

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   public partial class Payment : ComponentBase

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   {

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       [Inject, FromKeyedServices("PayPal")]

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       public IPaymentService PaymentService { get; set; } = default!;

2. Access ClaimsPrincipal in a Blazor C... Access ClaimsPrincipal in a Blazor Component

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   @page "/user-info"

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   <h3>User Information</h3>

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   @if (user != null)