pass string array from x++ to .net (Dynamics ax 2009 integration with .net)

i want to pass a string array from x++ to C# method. but it is giving an error : Argument '1' is incompatible with required type.

X++ code:

public static server str callfunction()

{

MagentoTrigger.MagentoAXServiceSoapClient soapClient;                        //   .net webservice object

str ret;

str arry[2];

;

arry[1] = "101";

arry[2] = "102";

new InteropPermission(InteropKind::ClrInterop).assert();

soapClient = new MagentoTrigger.MagentoAXServiceSoapClient('MagentoAXServiceSoap');

 ret = soapClient.Sync_Item_Selective(arry);                     // getting error : Argument '1' is incompatible with required type

                                                                                                      //method : string Sync_Item_Selective(string[] array)

CodeAccessPermission::revertAssert();

return ret;

}

Sync_Item_Selective method takes "string array" as argument. but i am unable to pass string array from x++.

i have also tried with list, container. but i dont know how to use container in .net

plz suggest me, i just want to pass a string array to .net method.