Program.cs

string[] array = { "a", "b", "c", "d", "e" };
// Using Span ctor (array, start, length)
// Note that the spans overlap
var firstView = new Span<string>(array, 0, 3);
PrintArray(firstView);
var secondView = new Span<string>(array, 2, 3);
PrintArray(secondView);

firstView[0] = "w";
PrintArray(array);
// array = { "w", "b", "c", "d", "e" }
firstView[2] = "x";
PrintArray(array);
// array = { "w", "b", "x", "d", "e" }
secondView[0] = "y";
PrintArray(array);
// array = { "w", "b", "y", "d", "e" }

// Throws IndexOutOfRangeException
// firstView[4] = "a";

void PrintArray(Span<string> array)
{
    foreach (string? item in array)
    {
        Console.Write($"{item}, ");
    }
    Console.WriteLine();
}