@wenima: The description of the task is to return "a matching list in the reverse order.", not to reverse the list in-place.

Checked. Fixed. :-)
And the issues are closed! :-)

Re-ran and can confirm all tests now passing in C#. Thank you so much for fixing this so quickly!

The problem seems to be fixed. It's a good kata, thanks!

They also expect "0" in other cases: (1110, 001110)
Expected: "0"
But was: "11100"

It's OK now. Thanks!

The tests still expect "0" if one of the two strings does not contain a "1".

Could you please try again?

Could you please try again?

Could you please try again?

I will check this.

Please fix the above issues.

I got the same problem as wolfascu. The C# random tests should be broken. This is what I got:

Testing for Add(111, 00);

✘ Expected string length 1 but was 3. Strings differ at index 0.
Expected: "0"
But was: "111"
-----------^

I think the C# random tests may be broken. For example, for 00 + 0011 I get the error:

✘     Expected string length 1 but was 2. Strings differ at index 0.
Expected: "0"
But was:  "11"

I just completed this exercise in Ruby and the tests seem to be OK.