Please read the project article at codeproject.com

https://www.codeproject.com/Tips/5377103/ChatGPT-API-in-Csharp-WPF-XAML-MVVM

C# WPF ChatGPT

C# WPF app that communicates OpenAI GPT3.5-turbo API

Setup

Create an Open AI account to obtain an API key (free): https://platform.openai.com/account/api-keys

You can use the key as a command line parameter (without compiling the project):

1. Click CSharpWpfChatGPT_v1.2 under Releases on the right side of this page
2. Download CSharpWpfChatGPT_v1.2_net6.0-windows.zip
3. Unzip the file and run CSharpWpfChatGPT.exe /the key obtained above (CSharpWpfChatGPT.exe /sk-Ih...WPd)

Or in App.xaml.cs, modify this line: return "<Your Open AI API Key is something like "sk-Ih...WPd">";

Build CSharpWpfChatGPT.sln with Visual Studio 2022 (Community version okay). This app is targeted for .NET 6 and 8. If you don't have .NET 8 installed, remove net8.0-windows in CSharpWpfChatGPT.csproj.

Whetstone.ChatGPT

I used John Iwasz's excellent Whetstone.ChatGPT to do the heavy lifting for ChatGPT API calls.

https://www.nuget.org/packages/Whetstone.ChatGPT

Other Supporting Libraries

CommunityToolkit.Mvvm

https://www.nuget.org/packages/CommunityToolkit.Mvvm

ModernWpfUI

https://www.nuget.org/packages/ModernWpfUI/

RestoreWindowPlace

https://www.nuget.org/packages/RestoreWindowPlace