update csharp related configs for attestation (#39250)

Author: ArcturusZhang

specification/attestation/resource-manager/Microsoft.Attestation/Attestation/client.tsp

@@ -2,9 +2,68 @@ import "@azure-tools/typespec-client-generator-core";
 import "./main.tsp";
 
 using Azure.ClientGenerator.Core;
+using Azure.Core;
+using Microsoft.Attestation;
 
 @@clientName(Microsoft.Attestation,
   "AttestationManagementClient",
   "javascript"
 );
 @@clientName(Microsoft.Attestation, "AttestationManagementClient", "python");
+
+// csharp configurations
+@@alternateType(Azure.ResourceManager.CommonTypes.Resource.id,
+  armResourceIdentifier,
+  "csharp"
+);
+@@clientName(PrivateEndpointConnection,
+  "AttestationPrivateEndpointConnection",
+  "csharp"
+);
+@@clientName(AttestationServiceCreationParams,
+  "AttestationProviderCreateOrUpdateContent",
+  "csharp"
+);
+@@alternateType(AttestationServiceCreationParams.location,
+  Azure.Core.azureLocation,
+  "csharp"
+);
+@@clientName(AttestationServicePatchSpecificParams,
+  "AttestationProviderPatchProperties",
+  "csharp"
+);
+@@clientName(JsonWebKey, "AttestationJsonWebKey", "csharp");
+@@clientName(PublicNetworkAccessType,
+  "AttestationPublicNetworkAccessType",
+  "csharp"
+);
+@@clientName(AttestationProvidersOperationGroup.listDefault,
+  "GetDefaultAttestationProvider",
+  "csharp"
+);
+@@clientName(AttestationProvidersOperationGroup.getDefaultByLocation,
+  "GetDefaultAttestationProviderByLocation",
+  "csharp"
+);
+@@clientName(AttestationProviders.listByProvider,
+  "GetPrivateLinkResources",
+  "csharp"
+);
+@@alternateType(StatusResult.attestUri, url, "csharp");
+#suppress "@azure-tools/typespec-azure-core/no-legacy-usage" "FIXME: Update justification, follow aka.ms/tsp/conversion-fix for details"
+@@Azure.ClientGenerator.Core.Legacy.markAsPageable(AttestationProviders.listByResourceGroup,
+  "csharp"
+);
+#suppress "@azure-tools/typespec-azure-core/no-legacy-usage" "FIXME: Update justification, follow aka.ms/tsp/conversion-fix for details"
+@@Azure.ClientGenerator.Core.Legacy.markAsPageable(AttestationProviders.list,
+  "csharp"
+);
+#suppress "@azure-tools/typespec-azure-core/no-legacy-usage" "FIXME: Update justification, follow aka.ms/tsp/conversion-fix for details"
+@@Azure.ClientGenerator.Core.Legacy.markAsPageable(AttestationProviders.listByProvider,
+  "csharp"
+);
+#suppress "@azure-tools/typespec-azure-core/no-legacy-usage" "FIXME: Update justification, follow aka.ms/tsp/conversion-fix for details"
+@@Azure.ClientGenerator.Core.Legacy.markAsPageable(AttestationProvidersOperationGroup.listDefault,
+  "csharp"
+);
+@@usage(AttestationProvider, Usage.input, "csharp");

specification/attestation/resource-manager/Microsoft.Attestation/Attestation/tspconfig.yaml

@@ -39,6 +39,9 @@ options:
     generate-fakes: true
     head-as-boolean: true
     inject-spans: true
+  "@azure-typespec/http-client-csharp-mgmt":
+    emitter-output-dir: "{output-dir}/{service-dir}/{namespace}"
+    namespace: "Azure.ResourceManager.Attestation"
 linter:
   extends:
     - "@azure-tools/typespec-azure-rulesets/resource-manager"