ReplaceService

Swaps whatever is registered for TService with TImplementation, for overriding a default that a framework or another package registered first. Adds the registration when there was nothing to replace, so it is safe to call before the default exists. Only the first registration for the service is replaced, so reach for something else when the service is registered many times and resolved as a sequence.

Usage

using AlmightyShogun.Utils;
using Microsoft.Extensions.DependencyInjection;

builder.Services.ReplaceService<IClock, TestClock>();

WARNING

Order still matters in the other direction. A plain Add for the same service after this call wins when the service is resolved singly, because the last registration is the one returned.

Parameters

serviceLifetime: ServiceLifetime
Lifetime applied to the replacement. It need not match the lifetime of the registration being displaced.
Default: ServiceLifetime.Singleton

Returns

The same IServiceCollection instance with the registration replaced.

Type signature

public IServiceCollection ReplaceService<TService, TImplementation>(
    ServiceLifetime serviceLifetime = ServiceLifetime.Singleton
) where TService : class where TImplementation : class, TService;