Sorry about that, It's my first translation, I added some basic example test cases just now.

I guess the "Honor Percentile" means the percent of people you have beaten.

Yes,you're right! Thank you !

There is a mistake in second example :Kata.MinUnfairness([30,100,1000,150,60,250,10,120,20],5)==20 //The result should be 90.

Fine now,thank you!

C# RandomTests
✔ 9 assertions passed
✘ It should work for random inputs too
Expected string length 3 but was 4. Strings differ at index 0.
Expected: "3/4"
But was: "-3/4"
-----------^
It looks like the random test cases lose the negative signs when the results are below 1 ?

int[] a = new int[] {121, 144, 19, 161, 19, 144, 19, 11};
int[] b = new int[] {1111, 0, 144144, 1919, 161161, 1919, 144144, 19*19};
expected: false
but got: true