c# object pattern matching for multiple values

I know this is possible: if (item is { InventoryItemId: 21 })

But I need to do something like this if (item is { InventoryItemId: [21, 3] })

Is it somehow possible? I dont know how is this called, nor cannot find it after like and hour of googling. I will be glad for any input. Thanks.

No, that's not supported since the value must be a constant since the pattern is evaluated at compile time. So something like this is NOT supported:

int[] values = { 21, 3 };
if(values.Any(v => item is { InventoryItemId: v }))
{
}

So either use something like this (as Ash has commented):

if (item.InventoryItemId is 21 or 3) 
{
}

or use another approach to evaluate it (what i would do):

if(values.Contains(item.InventoryItemId)
{
}