"Generic Structs With Custom Parameterless Constructors"

public readonly struct User {
	public readonly string Name;
	public readonly int Age;

	public User() {
		Name = "<no name>";
		Age = -1;
	}
}

// ...

static void PrintStructDetails<T>() where T : struct {
	void EnumerateFieldsOnToConsole(T instance, [CallerArgumentExpression("instance")] string? instanceName = null) { // If you're confused about this line, see the "Caller Argument Expressions" section below
		foreach (var field in typeof(T).GetFields()) {
			Console.WriteLine($"Field '{field.Name}' in {instanceName}: {field.GetValue(instance)}");
		}
	}

	var newedInstance = new T();
	var defaultInstance = default(T);

	EnumerateFieldsOnToConsole(newedInstance);
	EnumerateFieldsOnToConsole(defaultInstance);
}