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+# Migration from IdentityServer to OpenIddict Guide
+
+This guide provides layer-by-layer guidance for migrating your existing application to OpenIddict. Since OpenIddict is only available with ABP v6.0, you need to update your existing application and apply required migrations in order to apply OpenIddict changes.
+
+Use the `abp update` command to update your existing application. See [Upgrading docs](../Upgrading.md) for more info. Apply required migrations by following the [Migration Guides](./Index.md) based on your application version.
+
+## Domain.Shared Layer
+
+- In `MyApplication.Domain.Shared.csproj` replace **project reference**:
+ ```csharp
+
+ ```
+ with
+ ```csharp
+
+ ```
+
+- In `MyApplicationDomainSharedModule.cs` replace usings and **module dependencies:**
+
+ ```csharp
+ using Volo.Abp.IdentityServer;
+ ...
+ typeof(AbpIdentityServerDomainSharedModule)
+ ```
+ with
+ ```csharp
+ using Volo.Abp.OpenIddict;
+ ...
+ typeof(AbpOpenIddictDomainSharedModule)
+
+## Domain Layer
+
+- In `MyApplication.Domain.csproj` replace **project references**:
+
+ ```csharp
+
+
+ ```
+
+ with
+
+ ```csharp
+
+
+ ```
+
+- In `MyApplicationDomainModule.cs` replace usings and **module dependencies**:
+
+ ```csharp
+ using Volo.Abp.IdentityServer;
+ using Volo.Abp.PermissionManagement.IdentityServer;
+ ...
+ typeof(AbpIdentityServerDomainModule),
+ typeof(AbpPermissionManagementDomainIdentityServerModule),
+ ```
+
+ with
+
+ ```csharp
+ using Volo.Abp.OpenIddict;
+ using Volo.Abp.PermissionManagement.OpenIddict;
+ ...
+ typeof(AbpOpenIddictDomainModule),
+ typeof(AbpPermissionManagementDomainOpenIddictModule),
+ ```
+
+### OpenIddictDataSeedContributor
+
+- Create a folder named *OpenIddict* under the Domain project and copy the [OpenIddictDataSeedContributor.cs](https://github.com/abpframework/abp-samples/blob/master/Ids2OpenId/src/Ids2OpenId.Domain/OpenIddict/OpenIddictDataSeedContributor.cs) under this folder. Rename all the `Ids2OpenId` with your project name.
+- Delete *IdentityServer* folder that contains `IdentityServerDataSeedContributor.cs` which is no longer needed.
+
+## EntityFrameworkCore Layer
+
+If you are using MongoDB, skip this step and check the *MongoDB* layer section.
+
+- In `MyApplication.EntityFrameworkCore.csproj` replace **project reference**:
+
+ ```csharp
+
+ ```
+
+ with
+
+ ```csharp
+
+ ```
+
+- In `MyApplicationEntityFrameworkCoreModule.cs` replace usings and **module dependencies**:
+
+ ```csharp
+ using Volo.Abp.IdentityServer.EntityFrameworkCore;
+ ...
+ typeof(AbpIdentityServerEntityFrameworkCoreModule),
+ ```
+
+ with
+
+ ```csharp
+ using Volo.Abp.OpenIddict.EntityFrameworkCore;
+ ...
+ typeof(AbpOpenIddictEntityFrameworkCoreModule),
+ ```
+
+- In `MyApplicationDbContext.cs` replace usings and **fluent api configurations**:
+
+ ```csharp
+ using Volo.Abp.IdentityServer.EntityFrameworkCore;
+ ...
+ using Volo.Abp.OpenIddict.EntityFrameworkCore;
+ ...
+ protected override void OnModelCreating(ModelBuilder builder)
+ {
+ base.OnModelCreating(builder);
+
+ /* Include modules to your migration db context */
+
+ ...
+ builder.ConfigureIdentityServer();
+ ```
+
+ with
+
+ ```csharp
+ using Volo.Abp.OpenIddict.EntityFrameworkCore;
+ ...
+ protected override void OnModelCreating(ModelBuilder builder)
+ {
+ base.OnModelCreating(builder);
+
+ /* Include modules to your migration db context */
+
+ ...
+ builder.ConfigureOpenIddict();
+ ```
+
+## MongoDB Layer
+
+If you are using EntityFrameworkCore, skip this step and check the *EntityFrameworkCore* layer section.
+
+- In `MyApplication.MongoDB.csproj` replace **project reference**:
+
+ ```csharp
+
+ ```
+
+ with
+
+ ```csharp
+
+ ```
+
+- In `MyApplicationMongoDbModule.cs` replace usings and **module dependencies**:
+
+ ```csharp
+ using Volo.Abp.IdentityServer.MongoDB;
+ ...
+ typeof(AbpIdentityServerMongoDbModule),
+ ```
+
+ with
+
+ ```csharp
+ using Volo.Abp.OpenIddict.MongoDB;
+ ...
+ typeof(AbpOpenIddictMongoDbModule),
+ ```
+
+## DbMigrator Project
+
+- In `MyApplication.DbMigrator.csproj` **add project reference**:
+
+ ```csharp
+
+ ```
+
+for creating the host builder.
+
+- In `appsettings.json` **replace IdentityServer section with OpenIddict:**
+
+ ```json
+ "OpenIddict": {
+ "Applications": {
+ "MyApplication_Web": {
+ "ClientId": "MyApplication_Web",
+ "ClientSecret": "1q2w3e*",
+ "RootUrl": "https://localhost:44384"
+ },
+ "MyApplication_App": {
+ "ClientId": "MyApplication_App",
+ "RootUrl": "http://localhost:4200"
+ },
+ "MyApplication_BlazorServerTiered": {
+ "ClientId": "MyApplication_BlazorServerTiered",
+ "ClientSecret": "1q2w3e*",
+ "RootUrl": "https://localhost:44346"
+ },
+ "MyApplication_Swagger": {
+ "ClientId": "MyApplication_Swagger",
+ "RootUrl": "https://localhost:44391"
+ }
+ }
+ }
+ ```
+
+ Replace **MyApplication** with your application name.
+
+## UI Layer
+
+- Angular
+- MVC/Razor
+- Blazor-Server
+- Blazor-Wasm
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