将字符串数组从VB6传递到C#.net

我试图将C#字符串数组传递给VB,将VB字符串数组传递给C#,如下所示C# – > VB工作正常但其他方式(VB => C#)给出一个编译错误,称为“函数或接口标记为受限制,或者function使用visual basic中不支持的自动化类型“.我的代码如下

C#

    public interface ITest   
    { 
         string[] GetArray();
         void SetArray(string[] arrayVal );
    }

    public class Test : ITest 
    {
        string[] ITest.GetArray() {                                //Working fine
            string[] stringArray = { "red ","yellow","blue" };
            return stringArray;
        }
    }

    void ITest.SetArray(string[] arrayVal) //Giving an issue
    {
       string[] stringArray1 = arrayVal;
    }

VB

Dim str As Variant
    Debug.Print ".NET server returned: "    
    For Each str In dotNETServer.GetArray      'dotNETServer=TestServer.Test
            Debug.Print str
    Next

    Dim arr(3) As String
    arr(1) = "Pahee"
    arr(2) = "Tharani"
    arr(3) = "Rathan"

    dotNETServer.SetArray (arr)         'This one causing the compile error which I mentioned earlier

更新：
::::::

We need to pass the array as reference in C#.在界面和方法中更改它

void SetArray(ref string[] arrayVal ); //ref added