Add csharp customizations for DomainServices migration

specification/domainservices/resource-manager/Microsoft.AAD/DomainServices/client.tsp

@@ -0,0 +1,90 @@
+import "@azure-tools/typespec-client-generator-core";
+import "./main.tsp";
+
+using Azure.ClientGenerator.Core;
+using Microsoft.AAD;
+
+// common-types v3 models `Resource.id` as a plain string, so the generated
+// ResourceData constructors take `string id` and fail to call the
+// `base(ResourceIdentifier id)` constructor. Map it to ResourceIdentifier for C#.
+@@alternateType(
+  Azure.ResourceManager.CommonTypes.Resource.id,
+  Azure.Core.armResourceIdentifier,
+  "csharp"
+);
+
+// AZC0030: model names must not end in 'Response' for the .NET SDK.
+@@clientName(
+  UnsuspendDomainServiceResponse,
+  "DomainServiceUnsuspendResult",
+  "csharp"
+);
+
+// The `DomainServices` operations interface generates an internal REST-operations
+// class named `DomainServices`, which collides with the last segment of the
+// `Azure.ResourceManager.DomainServices` namespace and forces the emitter to escape
+// the whole namespace to `_DomainServices`. Rename the operation group for C# to
+// avoid the collision (the class is internal, so this has no public API impact).
+@@clientName(DomainServices, "DomainServiceOperationGroup", "csharp");
+
+// Use the ARM ETag type instead of a plain string for resource etags.
+@@alternateType(DomainService.etag, Azure.Core.eTag, "csharp");
+@@alternateType(OuContainer.etag, Azure.Core.eTag, "csharp");
+
+// These `location` properties are Azure regions; use AzureLocation instead of string.
+@@alternateType(DomainService.location, Azure.Core.azureLocation, "csharp");
+@@alternateType(OuContainer.location, Azure.Core.azureLocation, "csharp");
+@@alternateType(ReplicaSet.location, Azure.Core.azureLocation, "csharp");
+
+// These properties are ARM subnet resource IDs; type them as ResourceIdentifier.
+@@alternateType(
+  ReplicaSet.subnetId,
+  Azure.Core.armResourceIdentifier,
+  "csharp"
+);
+@@alternateType(
+  MigrationProperties.oldSubnetId,
+  Azure.Core.armResourceIdentifier,
+  "csharp"
+);
+
+// .NET guideline: DateTimeOffset properties should end with `On`/`At`.
+@@clientName(ConfigDiagnostics.lastExecuted, "lastExecutedOn", "csharp");
+@@clientName(HealthAlert.lastDetected, "lastDetectedOn", "csharp");
+@@clientName(HealthAlert.raised, "raisedOn", "csharp");
+@@clientName(
+  LdapsSettings.certificateNotAfter,
+  "certificateNotAfterOn",
+  "csharp"
+);
+@@clientName(ReplicaSet.healthLastEvaluated, "healthLastEvaluatedOn", "csharp");
+
+// `Status` is a generic name in IntelliSense; it is the diagnostics validator status.
+@@clientName(Status, "DomainServiceValidatorStatus", "csharp");
+
+// These model/enum names are generic and lack service context in IntelliSense
+// (some, like `ReplicaSet`, collide with well-known concepts). Add the
+// `DomainService` prefix for the .NET SDK.
+@@clientName(ReplicaSet, "DomainServiceReplicaSet", "csharp");
+@@clientName(MigrationProperties, "DomainServiceMigrationProperties", "csharp");
+@@clientName(MigrationProgress, "DomainServiceMigrationProgress", "csharp");
+@@clientName(ConfigDiagnostics, "DomainServiceConfigDiagnostics", "csharp");
+@@clientName(
+  ConfigDiagnosticsValidatorResult,
+  "DomainServiceConfigDiagnosticsValidatorResult",
+  "csharp"
+);
+@@clientName(
+  ConfigDiagnosticsValidatorResultIssue,
+  "DomainServiceConfigDiagnosticsValidatorResultIssue",
+  "csharp"
+);
+@@clientName(HealthAlert, "DomainServiceHealthAlert", "csharp");
+@@clientName(HealthMonitor, "DomainServiceHealthMonitor", "csharp");
+@@clientName(
+  NotificationSettings,
+  "DomainServiceNotificationSettings",
+  "csharp"
+);
+@@clientName(ExternalAccess, "DomainServiceExternalAccess", "csharp");
+@@clientName(SyncScope, "DomainServiceSyncScope", "csharp");

specification/domainservices/resource-manager/Microsoft.AAD/DomainServices/main.tsp

@@ -15,6 +15,7 @@ import "./models.tsp";
 import "./back-compatible.tsp";
 import "./DomainService.tsp";
 import "./OuContainer.tsp";
+import "./client.tsp";
 using TypeSpec.Rest;
 using TypeSpec.Http;
 using Azure.ResourceManager.Foundations;

specification/domainservices/resource-manager/Microsoft.AAD/DomainServices/tspconfig.yaml

@@ -45,6 +45,9 @@ options:
     generate-fakes: true
     head-as-boolean: true
     inject-spans: true
+  "@azure-typespec/http-client-csharp-mgmt":
+    namespace: "Azure.ResourceManager.DomainServices"
+    emitter-output-dir: "{output-dir}/{service-dir}/{namespace}"
 linter:
   extends:
     - "@azure-tools/typespec-azure-rulesets/resource-manager"