Is it possible to have multiple dependency resolvers in ASP.NET MVC 3? -

is possible have more 1 dependency resolver in asp.net mvc 3 (similar case of modelbinders , providers)?

there 1 scenario think of having multiple 'containers' or 'resolvers' useful , multi-tenancy. multi tenancy run multiple customers (organizations, own set of users) in same web application, , dynamically switch based on login, request info, or domain info.

still, dependencyresolver.current -as darin noted- static, there's nothing can (or should this). however, hide multiple containers behind single idependencyresolver abstraction , return implementation based on criteria. might this:

public class multitenantdependencyresolver      : idependencyresolver {     func<int> tenantidselector,;     idictionary<int, idependencyresolver> tenantresolvers;      public multitenantdependencyresolver(         func<int> tenantidselector,         idictionary<int, idependencyresolver> tenantresolvers)     {         this.tenantidselector = tenantidselector;         this.tenantresolvers= tenantresolvers;     }      private idependencyresolver currentresolver     {          { return this.tenantresolvers[tenantidselector()]; }     }      public object getservice(type servicetype)     {         return this.currentresolver.getservice(servicetype);     }      public ienumerable<object> getservices(type servicetype)     {         return this.currentresolver.getallinstances(servicetype);     } } 

the following code snippet shows usage of multitenantdependencyresolver:

var tenantresolvers = new dictionary<int, idependencyresolver> {     { tenants.abcid, buildresolver(registerfortenantabc) },     { tenants.klmid, buildresolver(registerfortenantklm) },     { tenants.xyzid, buildresolver(registerfortenantxyz) }, };  var multitenantresolver = new multitenantresolver(     () => gettenantidfromurl(), tenantresolvers);  dependencyresolver.setresolver(multitenantresolver);   private static int gettenantidfromurl() {     // todo: return tenant id }  private static idependencyresolver buildresolver(     action<ikernel> tenantspecificregistrations) {     var kernel = new kernel();      // todo: tenant agnostic registrations. instance     kernel.bind<itimeprovider>().to<systemtimeprovider>();      tenantspecificregistrations(kernel);      return new ninjectdependencyresolver(kernel); }  private static void registerfortenantabc(ikernel kernel) {     // todo: regisrations abc tenant. instance     kernel.bind<ilogger>().to<abctenantlogger>(); }