Array Slicing in C#: retarget SliceArrays to .NET 10 and fix the crash on run

[vladimir-pecanac-main]

Sample update for the article "Array Slicing in C#" (https://code-maze.com/csharp-array-slicing/). Only collections-arrays/SliceArrays changes.

Changes:

• Both projects move from net6.0 to net10.0.
• The program no longer crashes on dotnet run. Main used to call only SliceArrayUsingRangeOperator, whose last line array[3..1] throws ArgumentOutOfRangeException. That line now lives in SliceArrayUsingReversedRange inside try/catch and prints the exception type. Every demonstration method is now called.
• array[..3] becomes array[..2] to match the article, and the test assertion moves from 3 to 2.
• Top-level statements replace namespace, class Program and static void Main.
• New demonstrations and tests: AsSpan(0, 3) and AsSpan(3), Span.Slice(0, 2), data.AsSpan()[^2..], List slicing with list[1..3], GetRange and CollectionsMarshal.AsSpan, and string slicing with text[5..] and text.AsSpan(5). A test pins the reversed range throwing. 6 tests become 15.

Packages, re-queried on NuGet on 2026-10-04 (newest stable that day):

• Microsoft.NET.Test.Sdk 16.9.4 to 18.10.1
• MSTest.TestAdapter 2.2.3 to 4.4.1
• MSTest.TestFramework 2.2.3 to 4.4.1
• coverlet.collector 3.0.2 to 10.1.0

Local run on SDK 10.0.302, runtime 10.0.10: build 0 warnings 0 errors, dotnet test 15 passed 0 failed, dotnet run exits 0, dotnet list package --vulnerable --include-transitive reports nothing.