Merge pull request #3774 from sdgilley/sdg-freshness

add install all at top of article

Author: prmerger-automator[bot]

articles/ai-foundry/how-to/develop/sdk-overview.md

@@ -7,8 +7,8 @@ ms.service: azure-ai-foundry
 ms.custom:
   - build-2024
   - ignite-2024
-ms.topic: overview
-ms.date: 02/27/2025
+ms.topic: how-to
+ms.date: 03/27/2025
 ms.reviewer: dantaylo
 ms.author: sgilley
 author: sdgilley
@@ -31,18 +31,75 @@ If you want to jump right in and start building an app, check out:
 - [Create a chat app](../../quickstarts/get-started-code.md)
 - [Create a custom RAG app](../../tutorials/copilot-sdk-create-resources.md)
 
-## Get started with Projects
+## Prerequisites
 
-The best way to get started using the Azure AI Foundry SDK is by using a project. AI projects connect together different data, assets, and services you need to build AI applications. The AI project client allows you to easily access these project components from your code by using a single connection string.
+* An Azure subscription. If you don't have one, create a [free account](https://azure.microsoft.com/free/).
+* [Create a project](../create-projects.md) if you don't have one already.
+* Sign in with the Azure CLI using the same account that you use to access your AI Project:
 
-First follow steps to [create an AI Project](../create-projects.md) if you don't have one already.
+    ```bash
+    az login
+    ```
 
-Sign in with the Azure CLI using the same account that you use to access your AI Project:
+## Install everything
 
-```bash
-az login
+Install all the Azure AI Foundry SDK packages as shown here, or install only the packages you need in the following sections.
+
+::: zone pivot="programming-language-python"
+
+1. Create a file named **requirements.txt**. Add the following packages to the file:
+
+    ```txt
+    azure-ai-projects 
+    azure-identity 
+    openai 
+    azure-ai-inference 
+    azure-search-documents 
+    azure-ai-evaluation 
+    azure-monitor-opentelemetry
+    ```
+
+1. Install the packages:
+
+    ```bash
+    pip install -r requirements.txt
+    ```
+
+---
+
+::: zone-end
+
+::: zone pivot="programming-language-csharp"
+
+```dotnet
+dotnet add package Azure.AI.Projects
+dotnet add package Azure.Identity
+dotnet add package Azure.AI.OpenAI
+dotnet add package Azure.AI.Inference
+dotnet add package Azure.Search.Documents
 ```
 
+Add using statements:
+
+```csharp
+using Azure.Identity;
+using Azure.AI.Projects;
+using OpenAI.Chat;
+using Azure.AI.OpenAI;
+using Azure.AI.Inference;
+using Azure.Search.Documents;
+using Azure.Search.Documents.Models;
+```
+
+---
+
+::: zone-end
+
+
+## Get started with projects
+
+The best way to get started using the Azure AI Foundry SDK is by using a project. AI projects connect together different data, assets, and services you need to build AI applications. The AI project client allows you to easily access these project components from your code by using a single connection string.
+
 Install the Azure AI projects client library:
 
 ::: zone pivot="programming-language-python"