The IContext.Send() methods in the Teams SDK do not currently support CancellationToken parameters, which is a best practice for async methods in .NET.

Current Behavior

The Send method signatures are:

Task<MessageActivity> Send(string text, bool isTargeted = false)
Task<MessageActivity> Send(IActivity activity)

Expected Behavior

All async Send methods should accept an optional CancellationToken parameter:

Task<MessageActivity> Send(string text, bool isTargeted = false, CancellationToken cancellationToken = default)
Task<MessageActivity> Send(IActivity activity, CancellationToken cancellationToken = default)

Why This Matters

• Follows .NET async best practices
• Enables graceful cancellation and timeout handling
• Important for request cancellation and application shutdown scenarios