Added initial code for setting system

Volo.Abp.sln

@@ -244,7 +244,13 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Volo.Abp.MultiTenancy.Appli
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Volo.Abp.MultiTenancy.Web", "src\Volo.Abp.MultiTenancy.Web\Volo.Abp.MultiTenancy.Web.csproj", "{0808036D-065B-4525-BF30-CBCEA062F8E9}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Volo.Abp.MultiTenancy.HttpApi", "src\Volo.Abp.MultiTenancy.HttpApi\Volo.Abp.MultiTenancy.HttpApi.csproj", "{06423FAC-67E2-4B7C-B29F-39578F460C4F}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Volo.Abp.MultiTenancy.HttpApi", "src\Volo.Abp.MultiTenancy.HttpApi\Volo.Abp.MultiTenancy.HttpApi.csproj", "{06423FAC-67E2-4B7C-B29F-39578F460C4F}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Volo.Abp.Settings", "src\Volo.Abp.Settings\Volo.Abp.Settings.csproj", "{CB6FD800-B6C5-4C2A-8920-B8A29C74AEF6}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Volo.Abp.Settings.EntityFrameworkCore", "src\Volo.Abp.Settings.EntityFrameworkCore\Volo.Abp.Settings.EntityFrameworkCore.csproj", "{1DCD9600-215A-4A94-AEFD-577568D62633}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Volo.Abp.Settings.Domain", "src\Volo.Abp.Settings.Domain\Volo.Abp.Settings.Domain.csproj", "{837BC537-3AEC-4F6D-9D64-9704F64D0E1E}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -640,6 +646,18 @@ Global
 		{06423FAC-67E2-4B7C-B29F-39578F460C4F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{06423FAC-67E2-4B7C-B29F-39578F460C4F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{06423FAC-67E2-4B7C-B29F-39578F460C4F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{CB6FD800-B6C5-4C2A-8920-B8A29C74AEF6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CB6FD800-B6C5-4C2A-8920-B8A29C74AEF6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CB6FD800-B6C5-4C2A-8920-B8A29C74AEF6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CB6FD800-B6C5-4C2A-8920-B8A29C74AEF6}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1DCD9600-215A-4A94-AEFD-577568D62633}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1DCD9600-215A-4A94-AEFD-577568D62633}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1DCD9600-215A-4A94-AEFD-577568D62633}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1DCD9600-215A-4A94-AEFD-577568D62633}.Release|Any CPU.Build.0 = Release|Any CPU
+		{837BC537-3AEC-4F6D-9D64-9704F64D0E1E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{837BC537-3AEC-4F6D-9D64-9704F64D0E1E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{837BC537-3AEC-4F6D-9D64-9704F64D0E1E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{837BC537-3AEC-4F6D-9D64-9704F64D0E1E}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -759,6 +777,9 @@ Global
 		{B65973F1-9EE0-4914-B6F2-D88F753E1D21} = {3CE22CAC-4B27-4EEC-A35E-C01219ED6E99}
 		{0808036D-065B-4525-BF30-CBCEA062F8E9} = {CA154803-3589-47B3-B7CB-B18F94FE1EB6}
 		{06423FAC-67E2-4B7C-B29F-39578F460C4F} = {CA154803-3589-47B3-B7CB-B18F94FE1EB6}
+		{CB6FD800-B6C5-4C2A-8920-B8A29C74AEF6} = {4C753F64-0C93-4D65-96C2-A40893AFC1E8}
+		{1DCD9600-215A-4A94-AEFD-577568D62633} = {4C753F64-0C93-4D65-96C2-A40893AFC1E8}
+		{837BC537-3AEC-4F6D-9D64-9704F64D0E1E} = {4C753F64-0C93-4D65-96C2-A40893AFC1E8}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {BB97ECF4-9A84-433F-A80B-2A3285BDD1D5}

src/AbpDesk/AbpDesk.EntityFrameworkCore/AbpDesk/EntityFrameworkCore/AbpDeskDbContext.cs

@@ -26,7 +26,7 @@ namespace AbpDesk.EntityFrameworkCore
         {
             base.OnModelCreating(modelBuilder);
 
-            modelBuilder.ConfigureMultiTenancy(MultiTenancyDbContext.TablePrefix, MultiTenancyDbContext.Schema);
+            modelBuilder.ConfigureMultiTenancy();
 
             //Use different classes to map each entity type, as a better practice?
             modelBuilder.Entity<Ticket>(b =>

src/Volo.Abp.Ddd/Volo/Abp/AbpServiceBase.cs

@@ -2,6 +2,7 @@
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;
 using Volo.Abp.Guids;
+using Volo.Abp.MultiTenancy;
 using Volo.Abp.ObjectMapping;
 using Volo.Abp.Uow;
 
@@ -17,6 +18,8 @@ namespace Volo.Abp
 
         public ILoggerFactory LoggerFactory { get; set; }
 
+        public ICurrentTenant CurrentTenant { get; set; }
+
         protected IUnitOfWork CurrentUnitOfWork => UnitOfWorkManager?.Current;
 
         protected ILogger Logger => _lazyLogger.Value;

src/Volo.Abp.IdentityServer.EntityFrameworkCore/Volo/Abp/IdentityServer/EntityFrameworkCore/AbpIdentityServerEntityFrameworkCoreModule.cs

@@ -1,6 +1,9 @@
 using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp.EntityFrameworkCore;
+using Volo.Abp.IdentityServer.ApiResources;
 using Volo.Abp.IdentityServer.Clients;
+using Volo.Abp.IdentityServer.Grants;
+using Volo.Abp.IdentityServer.IdentityResources;
 using Volo.Abp.Modularity;
 
 namespace Volo.Abp.IdentityServer.EntityFrameworkCore
@@ -14,7 +17,11 @@ namespace Volo.Abp.IdentityServer.EntityFrameworkCore
             services.AddAbpDbContext<IdentityServerDbContext>(options =>
             {
                 options.AddDefaultRepositories<IIdentityServerDbContext>();
+
                 options.AddRepository<Client, ClientRepository>();
+                options.AddRepository<ApiResource, ApiResourceRepository>();
+                options.AddRepository<IdentityResource, IdentityResourceRepository>();
+                options.AddRepository<PersistedGrant, PersistentGrantRepository>();
             });
 
             services.AddAssemblyOf<AbpIdentityServerEntityFrameworkCoreModule>();

src/Volo.Abp.MultiTenancy.Abstractions/Volo/Abp/MultiTenancy/CurrentTenant.cs

@@ -21,7 +21,7 @@ namespace Volo.Abp.MultiTenancy
             return SetCurrent(id);
         }
 
-        public IDisposable Clear()
+        public IDisposable Clear() //TODO: Remove
         {
             return Change(null);
         }

src/Volo.Abp.Settings.Domain/Volo.Abp.Settings.Domain.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <Import Project="..\..\common.props" />
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <AssemblyName>Volo.Abp.Settings.Domain</AssemblyName>
+    <PackageId>Volo.Abp.Settings.Domain</PackageId>
+    <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
+    <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
+    <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
+    <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
+    <RootNamespace />
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Volo.Abp.Ddd\Volo.Abp.Ddd.csproj" />
+    <ProjectReference Include="..\Volo.Abp.MultiTenancy.Abstractions\Volo.Abp.MultiTenancy.Abstractions.csproj" />
+    <ProjectReference Include="..\Volo.Abp.Settings\Volo.Abp.Settings.csproj" />
+  </ItemGroup>
+
+</Project>

src/Volo.Abp.Settings.Domain/Volo/Abp/Settings/AbpSettingsDomainModule.cs

@@ -0,0 +1,17 @@
+using Microsoft.Extensions.DependencyInjection;
+using Volo.Abp.Modularity;
+using Volo.Abp.MultiTenancy;
+
+namespace Volo.Abp.Settings
+{
+    [DependsOn(typeof(AbpSettingsModule))]
+    [DependsOn(typeof(AbpDddModule))]
+    [DependsOn(typeof(AbpMultiTenancyAbstractionsModule))]
+    public class AbpSettingsDomainModule : AbpModule
+    {
+        public override void ConfigureServices(IServiceCollection services)
+        {
+            services.AddAssemblyOf<AbpSettingsDomainModule>();
+        }
+    }
+}

src/Volo.Abp.Settings.Domain/Volo/Abp/Settings/ISettingRepository.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Volo.Abp.Domain.Repositories;
+
+namespace Volo.Abp.Settings
+{
+    public interface ISettingRepository : IBasicRepository<Setting, Guid>
+    {
+        Task<Setting> FindAsync(string name, string entityType, string entityId);
+
+        Task<List<Setting>> GetListAsync(string entityType, string entityId);
+    }
+}

src/Volo.Abp.Settings.Domain/Volo/Abp/Settings/Setting.cs

@@ -0,0 +1,48 @@
+using System;
+using JetBrains.Annotations;
+using Volo.Abp.Domain.Entities;
+using Volo.Abp.MultiTenancy;
+
+namespace Volo.Abp.Settings
+{
+    public class Setting : Entity<Guid>, IMultiTenant
+    {
+        public virtual Guid? TenantId { get; protected set; }
+
+        [NotNull]
+        public virtual string Name { get; protected set; }
+
+        [NotNull]
+        public virtual string Value { get; internal set; }
+
+        [CanBeNull]
+        public virtual string EntityType { get; protected set; }
+
+        [CanBeNull]
+        public virtual string EntityId { get; protected set; }
+
+        protected Setting()
+        {
+
+        }
+
+        public Setting(
+            Guid id, 
+            [NotNull] string name, 
+            [NotNull] string value, 
+            [CanBeNull] string entityType = null, 
+            [CanBeNull] string entityId = null, 
+            Guid? tenantId = null)
+        {
+            Check.NotNull(name, nameof(name));
+            Check.NotNull(value, nameof(value));
+
+            Id = id;
+            Name = name;
+            Value = value;
+            EntityType = entityType;
+            EntityId = entityId;
+            TenantId = tenantId;
+        }
+    }
+}

src/Volo.Abp.Settings.Domain/Volo/Abp/Settings/SettingStore.cs

@@ -0,0 +1,42 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Volo.Abp.DependencyInjection;
+
+namespace Volo.Abp.Settings
+{
+    public class SettingStore : AbpServiceBase, ISettingStore, ITransientDependency
+    {
+        private readonly ISettingRepository _settingRepository;
+
+        public SettingStore(ISettingRepository settingRepository)
+        {
+            _settingRepository = settingRepository;
+        }
+
+        public async Task<string> GetOrNullAsync(string name, string entityType, string entityId)
+        {
+            var setting = await _settingRepository.FindAsync(name, entityType, entityId);
+            return setting?.Value;
+        }
+
+        public async Task SetAsync(string name, string value, string entityType, string entityId)
+        {
+            var setting = await _settingRepository.FindAsync(name, entityType, entityId);
+            if (setting == null)
+            {
+                setting = new Setting(GuidGenerator.Create(), name, value, entityType, entityId, CurrentTenant.Id);
+                await _settingRepository.InsertAsync(setting);
+            }
+
+            setting.Value = value;
+            await _settingRepository.UpdateAsync(setting);
+        }
+
+        public async Task<List<SettingValue>> GetListAsync(string entityType, string entityId)
+        {
+            var setting = await _settingRepository.GetListAsync(entityType, entityId);
+            return setting.Select(s => new SettingValue(s.Name, s.Value)).ToList();
+        }
+    }
+}

src/Volo.Abp.Settings.EntityFrameworkCore/Volo.Abp.Settings.EntityFrameworkCore.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <Import Project="..\..\common.props" />
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <AssemblyName>Volo.Abp.Settings.EntityFrameworkCore</AssemblyName>
+    <PackageId>Volo.Abp.Settings.EntityFrameworkCore</PackageId>
+    <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
+    <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
+    <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
+    <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
+    <RootNamespace />
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Volo.Abp.EntityFrameworkCore\Volo.Abp.EntityFrameworkCore.csproj" />
+    <ProjectReference Include="..\Volo.Abp.Settings.Domain\Volo.Abp.Settings.Domain.csproj" />
+  </ItemGroup>
+
+</Project>

src/Volo.Abp.Settings.EntityFrameworkCore/Volo/Abp/Settings/EntityFrameworkCore/AbpSettingsDbContext.cs

@@ -0,0 +1,16 @@
+using Microsoft.EntityFrameworkCore;
+using Volo.Abp.EntityFrameworkCore;
+
+namespace Volo.Abp.Settings.EntityFrameworkCore
+{
+    public class AbpSettingsDbContext : AbpDbContext<AbpSettingsDbContext>, IAbpSettingsDbContext
+    {
+        public DbSet<Setting> Settings { get; set; }
+
+        public AbpSettingsDbContext(DbContextOptions<AbpSettingsDbContext> options)
+            : base(options)
+        {
+
+        }
+    }
+}

src/Volo.Abp.Settings.EntityFrameworkCore/Volo/Abp/Settings/EntityFrameworkCore/AbpSettingsEntityFrameworkCoreModule.cs

@@ -0,0 +1,22 @@
+using Microsoft.Extensions.DependencyInjection;
+using Volo.Abp.Modularity;
+
+namespace Volo.Abp.Settings.EntityFrameworkCore
+{
+    [DependsOn(typeof(AbpSettingsDomainModule))]
+    [DependsOn(typeof(AbpSettingsEntityFrameworkCoreModule))]
+    public class AbpSettingsEntityFrameworkCoreModule : AbpModule
+    {
+        public override void ConfigureServices(IServiceCollection services)
+        {
+            services.AddAbpDbContext<AbpSettingsDbContext>(options =>
+            {
+                options.AddDefaultRepositories<IAbpSettingsDbContext>();
+
+                options.AddRepository<Setting, EfCoreSettingRepository>();
+            });
+
+            services.AddAssemblyOf<AbpSettingsEntityFrameworkCoreModule>();
+        }
+    }
+}

src/Volo.Abp.Settings.EntityFrameworkCore/Volo/Abp/Settings/EntityFrameworkCore/EfCoreSettingRepository.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using Volo.Abp.Domain.Repositories.EntityFrameworkCore;
+using Volo.Abp.EntityFrameworkCore;
+
+namespace Volo.Abp.Settings.EntityFrameworkCore
+{
+    public class EfCoreSettingRepository : EfCoreRepository<IAbpSettingsDbContext, Setting, Guid>, ISettingRepository
+    {
+        public EfCoreSettingRepository(IDbContextProvider<IAbpSettingsDbContext> dbContextProvider)
+            : base(dbContextProvider)
+        {
+        }
+
+        public async Task<Setting> FindAsync(string name, string entityType, string entityId)
+        {
+            return await DbSet.FirstOrDefaultAsync(s => s.Name == name && s.EntityType == entityType && s.EntityId == entityId);
+        }
+
+        public async Task<List<Setting>> GetListAsync(string entityType, string entityId)
+        {
+            return await DbSet.Where(s => s.EntityType == entityType && s.EntityId == entityId).ToListAsync();
+        }
+    }
+}

src/Volo.Abp.Settings.EntityFrameworkCore/Volo/Abp/Settings/EntityFrameworkCore/IAbpSettingsDbContext.cs

@@ -0,0 +1,10 @@
+using Microsoft.EntityFrameworkCore;
+using Volo.Abp.EntityFrameworkCore;
+
+namespace Volo.Abp.Settings.EntityFrameworkCore
+{
+    public interface IAbpSettingsDbContext : IEfCoreDbContext
+    {
+        DbSet<Setting> Settings { get; set; }
+    }
+}

src/Volo.Abp.Settings/Volo.Abp.Settings.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <Import Project="..\..\common.props" />
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <AssemblyName>Volo.Abp.Settings</AssemblyName>
+    <PackageId>Volo.Abp.Settings</PackageId>
+    <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
+    <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
+    <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
+    <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
+    <RootNamespace />
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Volo.Abp.Core\Volo.Abp.Core.csproj" />
+  </ItemGroup>
+
+</Project>

src/Volo.Abp.Settings/Volo/Abp/Settings/AbpSettingsModule.cs

@@ -0,0 +1,13 @@
+using Microsoft.Extensions.DependencyInjection;
+using Volo.Abp.Modularity;
+
+namespace Volo.Abp.Settings
+{
+    public class AbpSettingsModule : AbpModule
+    {
+        public override void ConfigureServices(IServiceCollection services)
+        {
+            services.AddAssemblyOf<AbpSettingsModule>();
+        }
+    }
+}

src/Volo.Abp.Settings/Volo/Abp/Settings/CurrentTenantSettingContributor.cs

@@ -0,0 +1,21 @@
+using System.Threading.Tasks;
+
+namespace Volo.Abp.Settings
+{
+    public class CurrentTenantSettingContributor : ISettingContributor
+    {
+        private readonly ISettingStore _settingStore;
+
+        public CurrentTenantSettingContributor(ISettingStore settingStore)
+        {
+            _settingStore = settingStore;
+        }
+
+        public async Task<string> GetOrNull(string name)
+        {
+            //Optimization: Get all Tenant-42 settings and cache it!
+            var tenantId = 42; //Get from current tenant
+            return await _settingStore.GetOrNullAsync(name, "Tenant", tenantId.ToString());
+        }
+    }
+}

src/Volo.Abp.Settings/Volo/Abp/Settings/DefaultSettingContributor.cs

@@ -0,0 +1,20 @@
+using System.Threading.Tasks;
+
+namespace Volo.Abp.Settings
+{
+    public class DefaultSettingContributor : ISettingContributor
+    {
+        private readonly ISettingStore _settingStore;
+
+        public DefaultSettingContributor(ISettingStore settingStore)
+        {
+            _settingStore = settingStore;
+        }
+
+        public async Task<string> GetOrNull(string name)
+        {
+            //Optimization: Get all settings and cache it!
+            return await _settingStore.GetOrNullAsync(name, null, null);
+        }
+    }
+}

src/Volo.Abp.Settings/Volo/Abp/Settings/ISettingContributor.cs

@@ -0,0 +1,9 @@
+using System.Threading.Tasks;
+
+namespace Volo.Abp.Settings
+{
+    public interface ISettingContributor
+    {
+        Task<string> GetOrNull(string name);
+    }
+}

src/Volo.Abp.Settings/Volo/Abp/Settings/ISettingManager.cs

@@ -0,0 +1,20 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Volo.Abp.Settings
+{
+    public interface ISettingManager
+    {
+        Task<string> GetOrNullAsync(string name);
+
+        Task<string> GetOrNullAsync(string name, string entityType, string entityId, bool fallback = true);
+
+        Task<List<SettingValue>> GetAllAsync();
+
+        Task<List<SettingValue>> GetAllAsync(string entityType, string entityId, bool fallback = true);
+
+        Task SetAsync(string name, string value);
+
+        Task SetAsync(string name, string value, string entityType, string entityId);
+    }
+}

src/Volo.Abp.Settings/Volo/Abp/Settings/ISettingStore.cs

@@ -0,0 +1,15 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using JetBrains.Annotations;
+
+namespace Volo.Abp.Settings
+{
+    public interface ISettingStore
+    {
+        Task<string> GetOrNullAsync([NotNull] string name, [CanBeNull] string entityType, [CanBeNull] string entityId);
+
+        Task SetAsync([NotNull] string name, [NotNull] string value, [CanBeNull] string entityType, [CanBeNull] string entityId);
+
+        Task<List<SettingValue>> GetListAsync([CanBeNull] string entityType, [CanBeNull] string entityId);
+    }
+}

src/Volo.Abp.Settings/Volo/Abp/Settings/SettingManager.cs

@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Volo.Abp.Settings
+{
+    public class SettingManager : ISettingManager
+    {
+        public Task<string> GetOrNullAsync(string name)
+        {
+            return GetOrNullAsync(name, null, null);
+        }
+
+        public Task<string> GetOrNullAsync(string name, string entityType, string entityId, bool fallback = true)
+        {
+            var contributors = new List<ISettingContributor>();
+
+            foreach (var contributor in contributors)
+            {
+                var value = contributor.GetOrNull(name);
+                if (value != null)
+                {
+                    return value;
+                }
+            }
+
+            return null;
+        }
+
+        public Task<List<SettingValue>> GetAllAsync()
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public Task<List<SettingValue>> GetAllAsync(string entityType, string entityId, bool fallback = true)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public Task SetAsync(string name, string value)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public Task SetAsync(string name, string value, string entityType, string entityId)
+        {
+            throw new System.NotImplementedException();
+        }
+    }
+}

src/Volo.Abp.Settings/Volo/Abp/Settings/SettingValue.cs

@@ -0,0 +1,22 @@
+namespace Volo.Abp.Settings
+{
+    public class SettingValue : NameValue
+    {
+        /// <summary>
+        /// Creates a new <see cref="NameValue"/>.
+        /// </summary>
+        public SettingValue()
+        {
+
+        }
+
+        /// <summary>
+        /// Creates a new <see cref="NameValue"/>.
+        /// </summary>
+        public SettingValue(string name, string value)
+        {
+            Name = name;
+            Value = value;
+        }
+    }
+}