string s1, s2;
            int res;
            s1 = "CSK."; s2 = "CSK-";
            res = CompareTo(s1, s2);
            Console.WriteLine(res);

            s1 = "CSK.S"; s2 = "CSK-V";
            res = CompareTo(s1, s2);
            Console.WriteLine(res);

1
-1

        static void Main(string[] args)
        {
            string[] strings = new string[] { "CSK.", "CSK-", "CSK.S", "CSK-V" };
            Array.Sort<string>(strings);
            foreach (string s in strings)
                Console.WriteLine(s);
        }

CSK-
CSK.
CSK.S
CSK-V

    std::vector<std::string> strings;
    strings.push_back("CSK.");
    strings.push_back("CSK-");
    strings.push_back("CSK.S");
    strings.push_back("CSK-V");
    std::sort(strings.begin(), strings.end());
    for (size_t i = 0; i < strings.size(); ++i)
        std::cout << strings[i] << std::endl;

CSK-
CSK-V
CSK.
CSK.S

CSK-
CSK.
CSK.S
CSK-V

WH>CSK-
WH>CSK.
WH>CSK.S
WH>CSK-V
WH>

Str: CSK-
Str: CSK-V
Str: CSK.
Str: CSK.S

CSK-
CSK.
CSK-V
CSK.S

CSK-
CSK.
CSK.S
CSK-V

String.CompareOrdinal(string,string);

select 
 txt
from
(
    select 'CSK.' as txt
    union all 
    select 'CSK-'
    union all
    select 'CSK.S'
    union all
    select 'CSK-V'
) t
order by txt

CSK-
CSK.
CSK.S
CSK-V

            string s1, s2;
            int res;
            s1 = "CSK."; s2 = "CSK-";
            res = CompareTo(s1, s2);
            Console.WriteLine(res);

            s1 = "CSK.S"; s2 = "CSK-V";
            res = CompareTo(s1, s2);
            Console.WriteLine(res);

1
-1

The .NET Framework uses three distinct ways of sorting: word sort, string sort, and ordinal sort. Word sort performs a culture-sensitive comparison of strings. Certain nonalphanumeric characters might have special weights assigned to them; for example, the hyphen ("-") might have a very small weight assigned to it so that "coop" and "co-op" appear next to each other in a sorted list. String sort is similar to word sort, except that there are no special cases; therefore, all nonalphanumeric symbols come before all alphanumeric characters. Ordinal sort compares strings based on the Unicode values of each element of the string.

txt   
----- 
CSK-
CSK-V
CSK.
CSK.S

(4 row(s) affected)