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

Is there any way to have a default value for CancellationToken?

Unfortunately, this is not possible, as CancellationToken.None is not a compile time constant, which is a requirement for default values in optional arguments.

You can provide the same effect, however, by making an overloaded method instead of trying to use default parameters:

Task DoStuff(...., CancellationToken ct)
{
    //...
}

Task DoStuff(....)
{
    return DoStuff(...., CancellationToken.None);
}