BitArray.CopyTo(array, index) doesn't respect index - .NET Core 3.0 Preview 8

[danielValdezR]

BitArray CopyTo(Array, Int32) doesn't respect index

When using CopyTo method, the index passed as parameter is not respected and the BitArray is copied at the end of the Array. I found this issue when using a Byte array.

General

Console Project
.NET Core 3.0 Preview 8
Windows 10 Pro x64

byte[] byteArray = new byte[10];
BitArray bitArray = new BitArray(1);
bitArray[0] = true;

bitArray.CopyTo(byteArray, 5);

Expected: 1 in position 5 of byteArray
Actual: 1 at the end of the byteArray

Tested against past versions of .NET Core (.NET Core 2.X) and worked as `expected.```

[0xd4d]

It's probably better to post this bug report to the corefx repo: https://github.com/dotnet/corefx

[danielValdezR]

There's an issue already open in dotnet/corefx...
https://github.com/dotnet/corefx/issues/39929