非零下限

使用 Option Strict On,虽然 .NET Framework 允许创建具有非零下限的单维数组,但它们不是向量,因此与 VB.NET 类型数组不兼容。这意味着它们只能被视为 Array,因此不能使用普通数组 (index) 引用。

Dim a As Array = Array.CreateInstance(GetType(Integer), {4}, {-1})
For y = LBound(a) To UBound(a)
    a.SetValue(y * y, y)
Next
For y = LBound(a) To UBound(a)
    Console.WriteLine($"{y}: {a.GetValue(y)}")
Next

除了使用 Option Strict Off,你可以通过将数组视为 IList 来获得 (index) 语法,但是它不是数组,所以你不能在变量名上使用 LBoundUBound(你仍然没有避免拳击):

Dim nsz As IList = a
For y = LBound(a) To UBound(a)
    nsz(y) = 2 - CInt(nsz(y))
Next
For y = LBound(a) To UBound(a)
    Console.WriteLine($"{y}: {nsz(y)}")
Next

多维非零下界阵列兼容 VB.NET 多维类型化的数组:

Dim nza(,) As Integer = DirectCast(Array.CreateInstance(GetType(Integer),
                                   {4, 3}, {1, -1}), Integer(,))
For y = LBound(nza) To UBound(nza)
    For w = LBound(nza, 2) To UBound(nza, 2)
        nza(y, w) = -y * w + nza(UBound(nza) - y + LBound(nza),
                                 UBound(nza, 2) - w + LBound(nza, 2))
    Next
Next
For y = LBound(nza) To UBound(nza)
    Dim ly = y
    Console.WriteLine(String.Join(" ",
        Enumerable.Repeat(ly & ":", 1).Concat(
            Enumerable.Range(LBound(nza, 2), UBound(nza, 2) - LBound(nza, 2) + 1) _
            .Select(Function(w) CStr(nza(ly, w))))))
Next

MSDN 参考: Array.CreateInstance