Collaborative whiteboard demo built with ASP.NET Core, MongoDB, SignalR, HTML5 Canvas, and vanilla JavaScript.

• Program.cs wires MongoDB, SignalR, static files, and the minimal API endpoints.
• Services/ contains the board and user-profile persistence logic.
• Hubs/ contains the typed SignalR hub for collaboration traffic.
• wwwroot/ contains the browser shell, drawing canvas, and SignalR client.

• .NET 10 SDK
• MongoDB Atlas account or compatible MongoDB deployment

1. Initialize user secrets: dotnet user-secrets init
2. Store the MongoDB connection string: dotnet user-secrets set "MongoDB:ConnectionString" "<connection-string>"
3. Keep MongoDB:DatabaseName in appsettings.json (defaults to canvas).

dotnet run

Open a board at /boards/{name} or create one via /new.

The Tests/ project uses MSTest and targets net10.0.

For Atlas-backed integration tests, use a separate test database connection string in user secrets or environment variables so the development database is never reused.