Merge pull request #691 from johelvisguzman/GH-671

(GH-671) Prevent service provider from building every time a service is required

Author: johelvisguzman

src/DotNetToolkit.Repository.Extensions.Microsoft.DependencyInjection/ServiceCollectionExtensions.cs

@@ -131,7 +131,8 @@ public static IServiceCollection AddRepositories([NotNull] this IServiceCollecti
                 serviceLifetime));
 
             // Register resolver
-            RepositoryDependencyResolver.SetResolver(type => services.BuildServiceProvider().GetService(type));
+            var serviceProvider = services.BuildServiceProvider();
+            RepositoryDependencyResolver.SetResolver(type => serviceProvider.GetService(type));
 
             services.AddSingleton<IRepositoryDependencyResolver>(sp => RepositoryDependencyResolver.Current);