How to access variable return from TestComplete to C#

Hello,

I have this script in TC_Support file (TestComplete)
function testReceiveArray()
{
return new Array("123","456","789");
}

Now in C#, I can call it using Connect Runner:
var exp = Connect.Runner["CallMethod"]("TC_Support.testReceiveArray");
System.Diagnostics.Debug.WriteLine(arr[0]); << but this script does not print the value "123" >> ???

I'm using Testcomplete 12 and VS 2015.

Please help me

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Thanks & best regards,