.Net: add OpenAI Binary Content samples

Author: nkeenan38

dotnet/samples/Concepts/ChatCompletion/OpenAI_ChatCompletionWithFile.cs

@@ -0,0 +1,61 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.ChatCompletion;
+using Resources;
+
+namespace ChatCompletion;
+
+// This example shows how to use OpenAI chat completion with PDF files.
+public class OpenAI_ChatCompletionWithFile(ITestOutputHelper output) : BaseTest(output)
+{
+    [Fact]
+    public async Task LocalFileAsync()
+    {
+        var fileBytes = await EmbeddedResource.ReadAllAsync("employees.pdf");
+
+        var kernel = Kernel.CreateBuilder()
+            .AddOpenAIChatCompletion(TestConfiguration.OpenAI.ChatModelId, TestConfiguration.OpenAI.ApiKey)
+            .Build();
+
+        var chatCompletionService = kernel.GetRequiredService<IChatCompletionService>();
+
+        var chatHistory = new ChatHistory("You are a friendly assistant.");
+
+        chatHistory.AddUserMessage(
+        [
+            new TextContent("What’s in this file?"),
+            new BinaryContent(fileBytes, "application/pdf")
+        ]);
+
+        var reply = await chatCompletionService.GetChatMessageContentAsync(chatHistory);
+
+        Console.WriteLine(reply.Content);
+    }
+
+    [Fact]
+    public async Task DateUriFileAsync()
+    {
+        var fileBytes = await EmbeddedResource.ReadAllAsync("employees.pdf");
+        var fileBase64 = Convert.ToBase64String(fileBytes.ToArray());
+        var dataUri = $"data:application/pdf;base64,{fileBase64}";
+
+        var kernel = Kernel.CreateBuilder()
+            .AddOpenAIChatCompletion(TestConfiguration.OpenAI.ChatModelId, TestConfiguration.OpenAI.ApiKey)
+            .Build();
+
+        var chatCompletionService = kernel.GetRequiredService<IChatCompletionService>();
+
+        var chatHistory = new ChatHistory("You are a friendly assistant.");
+
+        chatHistory.AddUserMessage(
+        [
+            new TextContent("What’s in this file?"),
+            new BinaryContent(dataUri)
+        ]);
+
+        var reply = await chatCompletionService.GetChatMessageContentAsync(chatHistory);
+
+        Console.WriteLine(reply.Content);
+    }
+}

dotnet/samples/Concepts/README.md

@@ -80,6 +80,7 @@ dotnet test -l "console;verbosity=detailed" --filter "FullyQualifiedName=ChatCom
 - [OpenAI_ChatCompletionStreaming](https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Concepts/ChatCompletion/OpenAI_ChatCompletionStreaming.cs)
 - [OpenAI_ChatCompletionWebSearch](https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Concepts/ChatCompletion/OpenAI_ChatCompletionWebSearch.cs)
 - [OpenAI_ChatCompletionWithAudio](https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Concepts/ChatCompletion/OpenAI_ChatCompletionWithAudio.cs)
+- [OpenAI_ChatCompletionWithFile](https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Concepts/ChatCompletion/OpenAI_ChatCompletionWithFile.cs)
 - [OpenAI_ChatCompletionWithReasoning](https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Concepts/ChatCompletion/OpenAI_ChatCompletionWithReasoning.cs)
 - [OpenAI_ChatCompletionWithVision](https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Concepts/ChatCompletion/OpenAI_ChatCompletionWithVision.cs)
 - [OpenAI_CustomClient](https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Concepts/ChatCompletion/OpenAI_CustomClient.cs)