Default parameter for CancellationToken

Question

I have some async code that I would like to add a CancellationToken to. However, there are many implementations where this is not needed so I would like to have a d

Answer 1

It turns out that the following works:

Task DoStuff(...., CancellationToken ct = default(CancellationToken))

...or:

Task DoStuff(...., CancellationToken ct = default) // C# 7.1 and later

which, according to the documentation, is interpreted the same as CancellationToken.None:

You can also use the C# default(CancellationToken) statement to create an empty cancellation token.