List Pattern Slice

example.cs

https://devblogs.microsoft.com/dotnet/early-peek-at-csharp-11-features/#c-11-preview-list-patterns
// It's not middle, it's [1..^1], middle is only correct for 3 elements
// which could be assumed from https://github.com/dotnet/csharplang/blob/main/proposals/list-patterns.md because the examples
// simply do not include anything above 3 elements.
Console.WriteLine(CaptureSlice(new int[]{1,2,3}));
Console.WriteLine(CaptureSlice(new int[] { 1, 2, 3,4}));
Console.WriteLine(CaptureSlice(new int[] { 1, 2, 3, 4, 5 }));
Console.WriteLine(CaptureSlice(new int[] { 1, 2, 3, 4, 5, 6, 7, 8 }));
Console.ReadLine();
static string CaptureSlice(int[] values)
	=> values switch
		{
[1, .. var middle, _] => $"Middle {String.Join(", ", middle)}"
};

Output is:
Middle 2
Middle 2, 3
Middle 2, 3, 4
Middle 2, 3, 4, 5, 6, 7