Reflector gets wrong decompiling result?

[chants]

I just meant in those cases where caller never uses 'b' after the call then the assignment is optimizable (not the addition as you mention its an index):

private uint e(byte[] a, ref int b)
{
return BitConverter.ToUInt32(a, b + 4);
}

Anyway that's too advanced an optimization anyway. But the bug found in multiple tools is a good one which should be reported and fixed.