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Editorial Team
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Editorial Team
Asked: May 15, 20262026-05-15T18:00:44+00:00 2026-05-15T18:00:44+00:00

I am getting Index was outside the bounds of the array. error when using

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I am getting “Index was outside the bounds of the array.” error when using this code:

Dim RandomA As String = "aAÀàÁâÄäÅåĀāĂ㥹ǞǟǺǻÃãÄ"
TextBox1.Text = TextBox1.Text.Replace("a", RandomA((Int(Rnd() * RandomA.Count)) - 1))

I fail to see how the (random) index can be out of bounds?

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  1. Editorial Team
    Editorial Team
    2026-05-15T18:00:46+00:00Added an answer on May 15, 2026 at 6:00 pm

    Int(Rnd() * RandomA.Count) could return 0, and 0 – 1 is outside the bounds.

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