Converts an integer to string in any base

int-to-string-fast.cs

public static string IntToStringFast(int value, char[] baseChars)
{
    // 32 is the worst cast buffer size for base 2 and int.MaxValue
    var i = 32;

    var buffer = new char[i];
    var targetBase = baseChars.Length;

    do
    {
        buffer[--i] = baseChars[value % targetBase];
        value /= targetBase;
    }
    while (value > 0);

    // avoid re-allocating another array just to trim the size
    // by using string's ReadOnlySpan<char> ctor
    var trimmed = new ReadOnlySpan<char>(buffer, 0, 32 - i);
    return new string(trimmed);
}

I think it should be var trimmed = new ReadOnlySpan<char>(buffer, i, 32 - i);?