Fixed.

Fixed.

Well, I guess that works... as long as size is up to 152.

Same problem in JavaScript version. Would be nice for non-English programmers to clarify that 'y' is not a vowel (it is a vowel in Polish).

I was working in C#.

I only wrote the JavaScript and CoffeeScript versions, and those have the "expected" and "instead got" in the correct order. Which language were you working in that has it switched?

Thank you for this insight, I've been debugging my code for 30 minutes trying to figure out why I'm getting a random "Y" in my tests even though the result clearly doesn't.

Now I know I can stop, because my code works as intended.

This Kata feels broken.

Input string: No offense but,
Your writing is among the worst I've ever read

My result: N ffns bt,
r wrtng s mng th wrst 'v vr rd

DisemvowelTest
MultilineString
  Expected string length 41 but was 42. Strings differ at index 11.
  Expected: "N ffns bt,\nr wrtng s mng th wrst 'v vr rd"
  But was:  "N ffns bt,\nYr wrtng s mng th wrst 'v vr rd"
  -----------------------^
at DisemvowelTest.MultilineString () [0x00000] in :0 

Input string: What are you, a communist?
My result: Wht r , cmmnst?

OneMoreForGoodMeasure
  Expected string length 16 but was 17. Strings differ at index 6.
  Expected: "Wht r ,  cmmnst?"
  But was:  "Wht r y,  cmmnst?"
  -----------------^
at DisemvowelTest.OneMoreForGoodMeasure () [0x00000] in :0 

First of all, since the letter Y can be regarded as both a vowel and a consonant in English you should explicitly exclude it in the instructions if you mean to accept it as a consonant in your tests.

Second, it seems (as already stated three weeks ago) that "Expected" and "But was" have been mixed up. Please fix to avoid confusion for future participants.