[FR] Add ASP.NET Integration (Azure#16891)

* add aspnet integration

* exportapi

sdk/formrecognizer/Azure.AI.FormRecognizer/CHANGELOG.md

@@ -6,6 +6,7 @@
 - It defaults to the latest supported API version, which currently is `2.1-preview.1`.
 
 ### New Features
+- Added integration for ASP.NET Core.
 - Added support for pre-built business card recognition.
 - Added support for providing locale info when recognizing receipts and business cards. Supported locales include support EN-US, EN-AU, EN-CA, EN-GB, EN-IN.
 - Added support to train and recognize custom forms with selection marks such as check boxes and radio buttons. This functionality is only available in train with labels scenarios.

sdk/formrecognizer/Azure.AI.FormRecognizer/api/Azure.AI.FormRecognizer.netstandard2.0.cs

@@ -489,3 +489,12 @@ public enum TrainingStatus
         Failed = 2,
     }
 }
+namespace Microsoft.Extensions.Azure
+{
+    public static partial class FormRecognizerClientBuilderExtensions
+    {
+        public static Azure.Core.Extensions.IAzureClientBuilder<Azure.AI.FormRecognizer.FormRecognizerClient, Azure.AI.FormRecognizer.FormRecognizerClientOptions> AddFormRecognizerClient<TBuilder>(this TBuilder builder, System.Uri endpoint) where TBuilder : Azure.Core.Extensions.IAzureClientFactoryBuilderWithCredential { throw null; }
+        public static Azure.Core.Extensions.IAzureClientBuilder<Azure.AI.FormRecognizer.FormRecognizerClient, Azure.AI.FormRecognizer.FormRecognizerClientOptions> AddFormRecognizerClient<TBuilder>(this TBuilder builder, System.Uri endpoint, Azure.AzureKeyCredential credential) where TBuilder : Azure.Core.Extensions.IAzureClientFactoryBuilder { throw null; }
+        public static Azure.Core.Extensions.IAzureClientBuilder<Azure.AI.FormRecognizer.FormRecognizerClient, Azure.AI.FormRecognizer.FormRecognizerClientOptions> AddFormRecognizerClient<TBuilder, TConfiguration>(this TBuilder builder, TConfiguration configuration) where TBuilder : Azure.Core.Extensions.IAzureClientFactoryBuilderWithConfiguration<TConfiguration> { throw null; }
+    }
+}

sdk/formrecognizer/Azure.AI.FormRecognizer/src/FormRecognizerClientBuilderExtensions.cs

@@ -0,0 +1,43 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using Azure;
+using Azure.AI.FormRecognizer;
+using Azure.Core.Extensions;
+
+namespace Microsoft.Extensions.Azure
+{
+    /// <summary>
+    /// Extension methods to add <see cref="FormRecognizerClient"/> client to clients builder.
+    /// </summary>
+    public static class FormRecognizerClientBuilderExtensions
+    {
+        /// <summary>
+        /// Registers a <see cref="FormRecognizerClient"/> instance with the provided <paramref name="endpoint"/>.
+        /// </summary>
+        public static IAzureClientBuilder<FormRecognizerClient, FormRecognizerClientOptions> AddFormRecognizerClient<TBuilder>(this TBuilder builder, Uri endpoint)
+            where TBuilder : IAzureClientFactoryBuilderWithCredential
+        {
+            return builder.RegisterClientFactory<FormRecognizerClient, FormRecognizerClientOptions>((options, credential) => new FormRecognizerClient(endpoint, credential, options));
+        }
+
+        /// <summary>
+        /// Registers a <see cref="FormRecognizerClient"/> instance with the provided <paramref name="endpoint"/> and <paramref name="credential"/>.
+        /// </summary>
+        public static IAzureClientBuilder<FormRecognizerClient, FormRecognizerClientOptions> AddFormRecognizerClient<TBuilder>(this TBuilder builder, Uri endpoint, AzureKeyCredential credential)
+            where TBuilder : IAzureClientFactoryBuilder
+        {
+            return builder.RegisterClientFactory<FormRecognizerClient, FormRecognizerClientOptions>(options => new FormRecognizerClient(endpoint, credential, options));
+        }
+
+        /// <summary>
+        /// Registers a <see cref="FormRecognizerClient"/> instance with connection options loaded from the provided <paramref name="configuration"/> instance.
+        /// </summary>
+        public static IAzureClientBuilder<FormRecognizerClient, FormRecognizerClientOptions> AddFormRecognizerClient<TBuilder, TConfiguration>(this TBuilder builder, TConfiguration configuration)
+            where TBuilder : IAzureClientFactoryBuilderWithConfiguration<TConfiguration>
+        {
+            return builder.RegisterClientFactory<FormRecognizerClient, FormRecognizerClientOptions>(configuration);
+        }
+    }
+}