multidimensional array - Passing C# List to X++ -

in c# project in microsoft dynamics ax 2012 aot have method returns list , wanted refer method in x++ code.

my initial thought should easy. like: list xppprojectlist = csharpgetprojectlist.getstringlist();. however, didn't worked.

after extensive research on internet found out, use system.collections.arraylist instead of list , time works, single dimension collections.

x++ code that's supposed consume c# collection:

public void getprojectlist() {     csharpgetprojectlist = new ps2010service.csharpgetprojectlist();      projectlist = csharpgetprojectlist.getstringlist();      length = projectlist.get_count();     (i = 0; < length; i++)     {         info(projectlist.get_item(i));     } } 

c# method returning list<t> works:

public static list<string> getstringlist() {     list<string> list = new list<string>();     list.add("one");     list.add("two");     list.add("three");      return list; } 

c# method returning arraylist works:

public static arraylist getstringlist() {     arraylist list = new arraylist();     list.add("one");     list.add("two");     list.add("three");      return list; } 

c# method returning multidimensional arraylist doesn't work:

public arraylist getstringlist() {      arraylist list1 = new arraylist();     list1.add("one");     list1.add("two");     list1.add("three");      arraylist list2 = new arraylist();     list2.add("1");     list2.add("2");     list2.add("3");      arraylist list = new arraylist();      (int = 0; < list1.count; i++)     {         list.add(new string[] { list1[i].tostring(), list2[i].tostring() });     }      return list; } 

error returned is: clr interop marshal: unsupported type. error executing code: global (object), method info called invalid parameters. although can read length of arraylist , returns 3.

same goes multidimensional list<t> won't post here make question shorter.

so question - how consume c#'s multidimensional list in x++ code? thank you!

return value .net arraylist string[2] elements.

code should this:

system.collections.arraylist result = csharpgetprojectlist.getstringlist(); system.string[] netemement;  str val1, val2; int i;  (i=0; < result.get_count(); i++) {     netemement = result.get_item(i);     val1 = netemement.get_item(0);     val2 = netemement.get_item(1); } 

instead of for use enumerator:

system.collections.ienumerator netenumerator = result.getenumerator(); while (netenumerator.movenext()) {     netemement = netenumerator.get_current();     val1 = netemement.get_item(0);     val2 = netemement.get_item(1); }