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/// ResolveRequiredService /// throw exception if can not get a service instance /// </summary> /// <typeparam name="TService">TService</typeparam> /// <param name="serviceProvider">serviceProvider</param> /// <returns></returns> public static TService ResolveRequiredService<TService>([NotNull] this IServiceProvider serviceProvider) { var serviceType = typeof(TService); var svc = serviceProvider.GetService(serviceType); if (null == svc) { throw new InvalidOperationException($"service had not been registered, serviceType: {serviceType}"); } return (TService)svc; } /// <summary> /// Resolve services /// </summary> /// <typeparam name="TService">TService</typeparam> /// <param name="serviceProvider">serviceProvider</param> /// <returns></returns> public static IEnumerable<TService> ResolveServices<TService>([NotNull]this IServiceProvider serviceProvider) => serviceProvider.ResolveService<IEnumerable<TService>>();

More#

后面还更新了一版，主要优化性能，目前来说还不太满意，暂时这里先不提了

Reference#

• Dynamic Casting using Reflection
• https://github.com/WeihanLi/WeihanLi.Common/blob/dev/test/WeihanLi.Common.Test/DependencyInjectionTest.cs