dependency injection - Custom IServicePovider is not always used -

in startup.cs, want define extended serviceprovider: wraps default iserviceprovider implementation.

public iserviceprovider configureservices(iservicecollection services) {    [...]    var servicesprovider = services.buildextendedserviceprovider();    return servicesprovider; } 

here core extended service provider implementation

/// <summary> /// extends native asp.net service provider  /// </summary> public class extendedservicesprovider : iserviceprovider {     private readonly iserviceprovider _serviceprovider;      /// <summary>     /// creates new instance of <see cref="extendedservicesprovider"/> provider based on native mvc <see cref="iserviceprovider"/>     /// </summary>     /// <param name="serviceprovider"></param>     public extendedservicesprovider(iserviceprovider serviceprovider)     {         _serviceprovider = serviceprovider;     }      /// <inheritdoc />     public object getservice(type servicetype)     {         var resolvedservice = _serviceprovider.getservice(servicetype);         [...]         return resolvedservice;     } } 

at startup, can see getservice called each service "singleton" life time (great!!) however, not called anymore after that, , default serviceprovider called instead... way, if request resolution of iserviceprovider, native 1 get.

i serviceprovider replace native 1 , called every time.

did miss something??

ok, checked source code (i should have checked before posting question sorry). https://github.com/aspnet/dependencyinjection/blob/master/src/microsoft.extensions.dependencyinjection/serviceprovider.cs

the build method adds iserviceprovider type native instance. there seem have no way modify (without reflection on "_table" field mean :-). seems me approach not good.

i think i'll try other dependency injection engines such autofac, wanted keep native engine seemed me light weight.