D code:
auto arr = ["b1=1", "b=2","a1=1", "a=2"];
writeln(arr.sort());

output:["a1=1", "a=2", "b1=1", "b=2"]

C# code:
var arr = new string[]{ "b1=1", "b=2", "a1=1", "a=2" };
Array.Sort(arr);

output:["a=2","a1=1","b=2","b1=1"]

On Friday, 22 January 2016 at 06:53:29 UTC, mzfhhhh wrote:
> D code:
> auto arr = ["b1=1", "b=2","a1=1", "a=2"];
> writeln(arr.sort());
>
> output:["a1=1", "a=2", "b1=1", "b=2"]
>
> C# code:
> var arr = new string[]{ "b1=1", "b=2", "a1=1", "a=2" };
> Array.Sort(arr);
>
> output:["a=2","a1=1","b=2","b1=1"]

I don't what string sorting criteria is using C#, but '9' < '=', so should be ["a1=1", "a=2", "b1=1", "b=2"]

On Friday, 22 January 2016 at 06:53:29 UTC, mzfhhhh wrote:
> D code:
> auto arr = ["b1=1", "b=2","a1=1", "a=2"];
> writeln(arr.sort());
>
> output:["a1=1", "a=2", "b1=1", "b=2"]
>
> C# code:
> var arr = new string[]{ "b1=1", "b=2", "a1=1", "a=2" };
> Array.Sort(arr);
>
> output:["a=2","a1=1","b=2","b1=1"]

 auto arr1 = ["b1=1", "b=2", "a1=1", "a=2"];
 auto arr2 = ["b1 = 1", "b = 2", "a1 = 1", "a = 2"];

 arr1.sort.writeln; // ["a1=1", "a=2", "b1=1", "b=2"]
 arr2.sort.writeln; // ["a = 2", "a1 = 1", "b = 2", "b1 = 1"]

i know the reason,C# have several compares methods.
String.Compare , String.CompareOrdinal

//now the output is same as the D code
Array.Sort(arr, string.CompareOrdinal);