Challenge 1: Comparing GetType() Across Type Arguments — Possible Solution
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Program.cs:

List<string> strings = new();
List<int> ints = new();

// Unlike java2-1's own Java example -- where strings.getClass() ==
// ints.getClass() returns TRUE, because Java erases List<String> and
// List<Integer> down to the exact same raw List class -- C#'s
// reification means List<string> and List<int> genuinely ARE
// different runtime types. The CLR keeps real type information for
// each type argument, so GetType() correctly reports them as
// distinct, rather than collapsing them into one shared type the way
// Java's erasure does.
Console.WriteLine(strings.GetType() == ints.GetType());

Output:

    False

WHY THIS WORKS AS AN ANSWER
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This directly mirrors java2-1's own opening example but produces the
opposite result, with the comment correctly explaining WHY in terms
of reification vs. erasure -- the chapter's own central claim.