Created Volo.Abp.Core package.

src/AbpDesk/AbpDesk.Application.Contracts/AbpDesk/AbpDeskApplicationContractsModule.cs

@@ -0,0 +1,11 @@
+using Volo.Abp;
+using Volo.Abp.Modularity;
+
+namespace AbpDesk
+{
+    [DependsOn(typeof(AbpCommonModule))]
+    public class AbpDeskApplicationContractsModule : AbpModule
+    {
+
+    }
+}

src/AbpDesk/AbpDesk.Application/AbpDesk/AbpDeskApplicationModule.cs

@@ -4,7 +4,11 @@ using Volo.Abp.Modularity;
 
 namespace AbpDesk
 {
-    [DependsOn(typeof(AbpDeskDomainModule), typeof(AbpAutoMapperModule))]
+    [DependsOn(
+        typeof(AbpDeskDomainModule), 
+        typeof(AbpDeskApplicationContractsModule), 
+        typeof(AbpAutoMapperModule)
+        )]
     public class AbpDeskApplicationModule : AbpModule
     {
         public override void ConfigureServices(IServiceCollection services)

src/AbpDesk/AbpDesk.Domain/AbpDesk/AbpDeskDomainModule.cs

@@ -1,8 +1,10 @@
 using Microsoft.Extensions.DependencyInjection;
+using Volo.Abp;
 using Volo.Abp.Modularity;
 
 namespace AbpDesk
 {
+    [DependsOn(typeof(AbpCommonModule))]
     public class AbpDeskDomainModule : AbpModule
     {
         public override void ConfigureServices(IServiceCollection services)

src/AbpDesk/AbpDesk.SamplePlugInModule/AbpDeskSamplePlugInModule.cs

@@ -1,4 +1,5 @@
 using Microsoft.Extensions.DependencyInjection;
+using Volo.Abp;
 using Volo.Abp.Modularity;
 
 namespace AbpDesk.SamplePlugInModule
@@ -6,6 +7,7 @@ namespace AbpDesk.SamplePlugInModule
     /* This is just a sample plugin module to test loading plugin modules.
      */
 
+    [DependsOn(typeof(AbpCommonModule))]
     public class AbpDeskSamplePlugInModule : AbpModule
     {
         public override void ConfigureServices(IServiceCollection services)

src/Volo.Abp.Account.Application.Contracts/Volo/Abp/Account/AbpAccountApplicationContractsModule.cs

@@ -3,6 +3,7 @@ using Volo.Abp.Modularity;
 
 namespace Volo.Abp.Account
 {
+    [DependsOn(typeof(AbpCommonModule))]
     public class AbpAccountApplicationContractsModule : AbpModule
     {
         public override void ConfigureServices(IServiceCollection services)

src/Volo.Abp.AutoMapper/Volo/Abp/AutoMapper/AbpAutoMapperModule.cs

@@ -10,6 +10,7 @@ using Volo.Abp.Reflection;
 
 namespace Volo.Abp.AutoMapper
 {
+    [DependsOn(typeof(AbpCommonModule))]
     public class AbpAutoMapperModule : AbpModule
     {
         private static volatile bool _createdMappingsBefore;

src/Volo.Abp.Autofac/Volo.Abp.Autofac.csproj

@@ -19,7 +19,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Volo.Abp.Castle.Core\Volo.Abp.Castle.Core.csproj" />
-    <ProjectReference Include="..\Volo.Abp\Volo.Abp.csproj" />
   </ItemGroup>
 
 </Project>

src/Volo.Abp.Castle.Core/Volo/Abp/Castle/AbpCastleCoreModule.cs

@@ -4,6 +4,7 @@ using Volo.Abp.Modularity;
 
 namespace Volo.Abp.Castle
 {
+    [DependsOn(typeof(AbpCommonModule))]
     public class AbpCastleCoreModule : AbpModule
     {
         public override void ConfigureServices(IServiceCollection services)

src/Volo.Abp.Core/Microsoft/Extensions/DependencyInjection/ServiceCollectionCommonExtensions.cs

@@ -124,7 +124,7 @@ namespace Microsoft.Extensions.DependencyInjection
         /// Returns a <see cref="Lazy{T}"/> to resolve a service from given <see cref="IServiceCollection"/>
         /// once dependency injection registration phase completed.
         /// </summary>
-        internal static Lazy<T> GetServiceLazy<T>(this IServiceCollection services)
+        public static Lazy<T> GetServiceLazy<T>(this IServiceCollection services)
         {
             return new Lazy<T>(services.GetService<T>, true);
         }
@@ -133,7 +133,7 @@ namespace Microsoft.Extensions.DependencyInjection
         /// Returns a <see cref="Lazy{T}"/> to resolve a service from given <see cref="IServiceCollection"/>
         /// once dependency injection registration phase completed.
         /// </summary>
-        internal static Lazy<object> GetServiceLazy(this IServiceCollection services, Type type)
+        public static Lazy<object> GetServiceLazy(this IServiceCollection services, Type type)
         {
             return new Lazy<object>(() => services.GetService(type), true);
         }
@@ -142,7 +142,7 @@ namespace Microsoft.Extensions.DependencyInjection
         /// Returns a <see cref="Lazy{T}"/> to resolve a service from given <see cref="IServiceCollection"/>
         /// once dependency injection registration phase completed.
         /// </summary>
-        internal static Lazy<T> GetRequiredServiceLazy<T>(this IServiceCollection services)
+        public static Lazy<T> GetRequiredServiceLazy<T>(this IServiceCollection services)
         {
             return new Lazy<T>(services.GetRequiredService<T>, true);
         }
@@ -151,7 +151,7 @@ namespace Microsoft.Extensions.DependencyInjection
         /// Returns a <see cref="Lazy{T}"/> to resolve a service from given <see cref="IServiceCollection"/>
         /// once dependency injection registration phase completed.
         /// </summary>
-        internal static Lazy<object> GetRequiredServiceLazy(this IServiceCollection services, Type type)
+        public static Lazy<object> GetRequiredServiceLazy(this IServiceCollection services, Type type)
         {
             return new Lazy<object>(() => services.GetRequiredService(type), true);
         }

src/Volo.Abp.Core/Microsoft/Extensions/Logging/LoggerExtensions.cs

@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using Volo.Abp.Logging;
-using Volo.Abp.Validation;
 
 namespace Microsoft.Extensions.Logging
 {
@@ -63,42 +61,37 @@ namespace Microsoft.Extensions.Logging
             var logLevel = (ex as IHasLogLevel)?.LogLevel ?? LogLevel.Error;
 
             logger.LogWithLevel(logLevel, ex.Message, ex);
-            LogValidationErrors(logger, ex);
+            LogDetails(logger, ex);
         }
 
-        private static void LogValidationErrors(ILogger logger, Exception exception)
+        private static void LogDetails(ILogger logger, Exception exception)
         {
-            //Try to find inner validation exception
-            if (exception is AggregateException && exception.InnerException != null)
-            {
-                var aggException = exception as AggregateException;
-                if (aggException.InnerException is AbpValidationException)
-                {
-                    exception = aggException.InnerException;
-                }
-            }
+            var loggingExceptions = new List<IExceptionCanLogDetails>();
 
-            if (!(exception is AbpValidationException))
+            if (exception is IExceptionCanLogDetails)
             {
-                return;
+                loggingExceptions.Add(exception as IExceptionCanLogDetails);
             }
-
-            var validationException = exception as AbpValidationException;
-            if (validationException.ValidationErrors.IsNullOrEmpty())
+            else if (exception is AggregateException && exception.InnerException != null)
             {
-                return;
-            }
+                var aggException = exception as AggregateException;
+                if (aggException.InnerException is IExceptionCanLogDetails)
+                {
+                    loggingExceptions.Add(aggException.InnerException as IExceptionCanLogDetails);
+                }
 
-            logger.LogWithLevel(validationException.LogLevel, "There are " + validationException.ValidationErrors.Count + " validation errors:");
-            foreach (var validationResult in validationException.ValidationErrors)
-            {
-                var memberNames = "";
-                if (validationResult.MemberNames != null && validationResult.MemberNames.Any())
+                foreach (var innerException in aggException.InnerExceptions)
                 {
-                    memberNames = " (" + string.Join(", ", validationResult.MemberNames) + ")";
+                    if (innerException is IExceptionCanLogDetails)
+                    {
+                        loggingExceptions.AddIfNotContains(innerException as IExceptionCanLogDetails);
+                    }
                 }
+            }
 
-                logger.LogWithLevel(validationException.LogLevel, validationResult.ErrorMessage + memberNames);
+            foreach (var ex in loggingExceptions)
+            {
+                ex.LogDetails(logger);
             }
         }
     }

src/Volo.Abp.Core/System/Linq/AbpQueryableExtensions.cs

@@ -1,7 +1,6 @@
 using System.Linq.Expressions;
 using JetBrains.Annotations;
 using Volo.Abp;
-using Volo.Abp.Application.Dtos;
 
 namespace System.Linq
 {
@@ -20,18 +19,6 @@ namespace System.Linq
             return query.Skip(skipCount).Take(maxResultCount);
         }
 
-        /// <summary>
-        /// Used for paging with an <see cref="IPagedResultRequest"/> object.
-        /// </summary>
-        /// <param name="query">Queryable to apply paging</param>
-        /// <param name="pagedResultRequest">An object implements <see cref="IPagedResultRequest"/> interface</param>
-        public static IQueryable<T> PageBy<T>([NotNull] this IQueryable<T> query, IPagedResultRequest pagedResultRequest)
-        {
-            Check.NotNull(query, nameof(query));
-
-            return query.PageBy(pagedResultRequest.SkipCount, pagedResultRequest.MaxResultCount);
-        }
-
         /// <summary>
         /// Filters a <see cref="IQueryable{T}"/> by given predicate if given condition is true.
         /// </summary>

src/Volo.Abp.Core/Volo/Abp/AbpApplicationBase.cs

@@ -37,6 +37,8 @@ namespace Volo.Abp
 
             services.AddSingleton<IAbpApplication>(this);
             services.AddSingleton<IModuleContainer>(this);
+
+            services.AddCoreServices();
             services.AddCoreAbpServices(this);
 
             Modules = LoadModules(services, options);

src/Volo.Abp.Core/Volo/Abp/Internal/InternalServiceCollectionExtensions.cs

@@ -7,6 +7,13 @@ namespace Volo.Abp.Internal
 {
     internal static class InternalServiceCollectionExtensions
     {
+        internal static void AddCoreServices(this IServiceCollection services)
+        {
+            services.AddOptions();
+            services.AddLogging();
+            services.AddLocalization();
+        }
+
         internal static void AddCoreAbpServices(this IServiceCollection services, IAbpApplication abpApplication)
         {
             var moduleLoader = new ModuleLoader();
@@ -16,6 +23,16 @@ namespace Volo.Abp.Internal
             services.TryAddSingleton<IModuleLoader>(moduleLoader);
             services.TryAddSingleton<IAssemblyFinder>(assemblyFinder);
             services.TryAddSingleton<ITypeFinder>(typeFinder);
+
+            services.AddAssemblyOf<IAbpApplication>();
+
+            services.Configure<ModuleLifecycleOptions>(options =>
+            {
+                options.Contributers.Add<OnPreApplicationInitializationModuleLifecycleContributer>();
+                options.Contributers.Add<OnApplicationInitializationModuleLifecycleContributer>();
+                options.Contributers.Add<OnPostApplicationInitializationModuleLifecycleContributer>();
+                options.Contributers.Add<OnApplicationShutdownModuleLifecycleContributer>();
+            });
         }
     }
 }

src/Volo.Abp.Core/Volo/Abp/Internal/Utf8Helper.cs

@@ -3,7 +3,7 @@ using System.Text;
 
 namespace Volo.Abp.Internal
 {
-    internal static class Utf8Helper
+    public static class Utf8Helper
     {
         public static string ReadStringFromStream(Stream stream)
         {

src/Volo.Abp.Core/Volo/Abp/Logging/IExceptionCanLogDetails.cs

@@ -0,0 +1,9 @@
+using Microsoft.Extensions.Logging;
+
+namespace Volo.Abp.Logging
+{
+    public interface IExceptionCanLogDetails
+    {
+        void LogDetails(ILogger logger);
+    }
+}

src/Volo.Abp.Core/Volo/Abp/Modularity/AbpModuleHelper.cs

@@ -11,7 +11,6 @@ namespace Volo.Abp.Modularity
         {
             var moduleTypes = new List<Type>();
             AddModuleAndDependenciesResursively(moduleTypes, startupModuleType);
-            moduleTypes.AddIfNotContains(typeof(AbpKernelModule));
             return moduleTypes;
         }
 

src/Volo.Abp.Core/Volo/Abp/Modularity/ModuleLoader.cs

@@ -73,7 +73,6 @@ namespace Volo.Abp.Modularity
         protected virtual List<IAbpModuleDescriptor> SortByDependency(List<IAbpModuleDescriptor> modules, Type startupModuleType)
         {
             var sortedModules = modules.SortByDependencies(m => m.Dependencies);
-            sortedModules.MoveItem(m => m.Type == typeof(AbpKernelModule), 0);
             sortedModules.MoveItem(m => m.Type == startupModuleType, modules.Count - 1);
             return sortedModules;
         }