The definition for Goose is not correct, the method with out body seems like definition for interface.
public class Goose
{
string Honk();
void Fly();
}

yes,pls fix the bug in test case.

I just return string.Empty,and get the error info.
Expected string length 0 but was 22. Strings differ at index 0.
Expected: <string.Empty>
But was: "Ths wbst s fr lsrs LL!"

So ,you mistaken the expected and acucal,pls double check your test code.

you have mistaken the expected and but was in C#:

Expected string length 29 but was 31. Strings differ at index 13.
Expected: "I like Cheese-Milk-Chocolate!"
But was: "I like Cheese, Milk, Chocolate!"

Expected string length 33 but was 31. Strings differ at index 13.
Expected: "I like Cheese???Milk???Chocolate!"
But was: "I like Cheese, Milk, Chocolate!"

I have no idea about the Assert.
I just give you an example,and i have tested the example with the solution provided by the others who submit successfully.

the output should be: 3,c,love,2,b,world,1,a,hello
however,the first solution I find provided by SteffenVogel_79
just output this: 3,c,love,2,b,world,System.Object[]

the test case is not enough,you should consider the array1's element could be another array,something like recursion

I have checked this test case,the wrong answer still can pass the test.
I hope you can fix the bug in the test case as soon as possible

yes,it is a test case for c#

the test case,should involve the space character

Start
1

length=2
True
End

can you tell me the origin string for this case?
i checked @"1
"
"1\r\n"
"1\n"

their length is 3,not 2

so,what's the origin string for that?

string s = @"1
";
bool flag = Digit(s);

when i try to submit,i can not pass a case

Start
1

True
End

MoreTests
Expected: False
But was: True

I think the case is @"1
";

i test ,i get false;
while your test system,get true?

where am i wrong?