C#7 tuple & async

Question

Old format:

private async Task<Tuple<SomeArray[], AnotherArray[], decimal>>          GetInvoiceDetailAsync(InvoiceHead invoiceHead) { ... } 

How can you do that in C#7 with new tuples format?

Answer 1

Step 1: add the ValueTuple nuget package to your project.

Step 2: as Lucas says in his comment, change the syntax to:

private async Task<(SomeArray[], AnotherArray[], decimal)>GetInvoiceDetailAsync(     InvoiceHead invoiceHead)  {      ...     return (x, y, z);  } 

Note though that you can also then add names to those tuple items, along the lines of:

private async Task<(SomeArray[] x, AnotherArray[] y, decimal z)>GetInvoiceDetailAsync(     InvoiceHead invoiceHead)  {      ...      return (x, y, z);  } 

And you can then access them as those names, rather than Item1, Item2 and Item3.