How do I add the Prefer header when I do a delta request?

[catmanjan]

How do I do this via the SDK?

[andrueastman]

Thanks for raising this @catmanjan

Any chance this doc is useful? It shows how to set the headers in the SDK.

https://github.com/microsoftgraph/msgraph-sdk-dotnet/blob/main/docs/headers.md

[catmanjan]

Thanks, where would I ask about the business rules behind this particular header?

I notice if I set it to 10,000 I get 510 emails back

[andrueastman]

With regards to the functionality of the API, you can post a question at https://aka.ms/askGraph